Tag: 300-400

Experimental, numerical and exergy analyses of a dual fuel combustion engine fuelled with syngas and biodiesel/diesel blends was written by Krishnamoorthi, M.;Sreedhara, S.;Prakash Duvvuri, Pavan. And the article was included in Applied Energy in 2020.Electric Literature of C20H40O2 The following contents are mentioned in the article:

This work investigates the effects of addition of syngas and biodiesel on a reactivity controlled compression ignition (RCCI) engine fuelled with diesel. SEM (SEM) of exhaust particulate matter has been done to obtain particulate matter (PM) morphol. Energy and exergy analyses have been performed to observe energy and availability shares, and to provide directions for the energy recovery systems. Closed cycle combustion simulations have been performed to complement the exptl. results and for an improved understanding of in-cylinder dynamics. Based on the initial study, used cooking oil based biodiesel blend (B20, 20% biodiesel) has been chosen in experiments The optimal operating conditions for syngas/diesel and syngas/B20 in RCCI mode for different operating parameters have been investigated. Injection pressure, injection timing and pre-injection mass ratio have been modified to get improved combustion efficiency at mid-load. Syngas/diesel mode with an injection timing of 19° before top dead center (bTDC) shows slightly higher brake thermal efficiency (BTE) with 22% and 77% lower oxides of nitrogen (NOx) and PM resp. as compared to conventional diesel combustion. In syngas/B20 mode, a maximum BTE of 24% has been observed for the case with a pre-injection at 50° bTDC with 30% mass fraction and 18° bTDC main injection timing. Syngas/diesel shows a reduction in primary soot particle count by about 67% and contains larger aggregates as compared to neat diesel. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Electric Literature of C20H40O2).

Methyl nonadecanoate (cas: 1731-94-8) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Electric Literature of C20H40O2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Comparative metabolite profiling of two switchgrass ecotypes reveals differences in drought stress responses and rhizosheath weight was written by Liu, Tie-Yuan;Chen, Mo-Xian;Zhang, Youjun;Zhu, Fu-Yuan;Liu, Ying-Gao;Tian, Yuan;Fernie, Alisdair R.;Ye, Nenghui;Zhang, Jianhua. And the article was included in Planta in 2019.Formula: C20H40O2 The following contents are mentioned in the article:

The aim of this work is to reveal the potential metabolites involved in rhizosheath formation under drought stress conditions. Panicum virgatum L. (switchgrass), which belongs to the Poaceae family, is an important biofuel and fodder crop in drought areas. Five switchgrass ecotypes (cv. Alamo, cv. Blackwake, cv. Summer, cv. Cave-in-Rock and cv. Kanlow) have a broad range of rhizosheath weight under drought conditions. GC-MS was used to determine the primary metabolites in the shoots and roots of selected ecotypes under drought stress conditions. The change trends of root hair length and d., lateral root number and related gene expression were consistent with rhizosheath weight in Alamo and Kanlow under drought and watered conditions. For root morphol. parameters, Alamo grew deeper than Kanlow, while Kanlow exhibited higher values for other parameters. In this study, the levels of amino acids, sugars and organic acids were significantly changed in response to drought stress in two switchgrass ecotypes. Several metabolites including amino acids and sugars in the large soil-sheathed roots of Alamo and Kanlow were significantly increased compared to small or no soil-sheathed roots of Alamo and Kanlow. Difference in rhizosheath size is reflected in the plant internal metabolites under drought stress conditions. Our results highlight the importance of using metabolite profiling and provide a better understanding of rhizosheath formation at the cellular level. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Formula: C20H40O2).

Methyl nonadecanoate (cas: 1731-94-8) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Formula: C20H40O2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Elucidating the involvement of apoptosis in postmortem proteolysis in porcine muscles from two production cycles using metabolomics approach was written by Ma, Danyi;Suh, Dong Ho;Zhang, Jiaying;Chao, Yufan;Duttlinger, Alan W.;Johnson, Jay S.;Lee, Choong Hwan;Kim, Yuan H. Brad. And the article was included in Scientific Reports in 2021.Synthetic Route of C21H44O5 The following contents are mentioned in the article:

Apoptosis has been suggested as the first step in the process of conversion of muscle into meat. While a potential role of apoptosis in postmortem proteolysis has been proposed, the underlying mechanisms by which metabolome changes in muscles would influence apoptotic and proteolytic process, leading to meat quality variation, has not been determined Here, apoptotic and proteolytic attributes and metabolomics profiling of longissimus dorsi (LD) and psoas major (PM) muscles in pigs from two different production cycles (July-Jan vs. Apr-Sep) were evaluated. The PM showed higher mitochondrial membrane permeability (MMP), concurrent with less extent of calpain-1 autolysis and troponin T degradation and higher abundance of HSP27 and αβ-crystallin compared to LD (P < 0.05). Apr-Sep muscles showed concurrence of extended apoptosis (indicated by higher MMP), calpain-1 autolysis and troponin T degradation, regardless of muscle effects (P < 0.05). Metabolomics profiling showed Apr-Sep muscles to increase in oxidative stress-related macronutrients, including 6-carbon sugars, some branched-chain AA, and free fatty acids. Antioxidant AA (His and Asp) and ascorbic acid were higher in July-Jan (P < 0.05). The results of the present study suggest that early postmortem apoptosis might be pos. associated with pro-oxidant macronutrients and neg. associated with antioxidant metabolites, consequently affecting meat quality attributes in a muscle-specific manner. This study involved multiple reactions and reactants, such as Glyceryl monostearate (cas: 31566-31-1Synthetic Route of C21H44O5).

Glyceryl monostearate (cas: 31566-31-1) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Synthetic Route of C21H44O5

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Glycoconjugation of betulin derivatives using copper-catalyzed 1,3-dipolar azido-alkyne cycloaddition reaction and a preliminary assay of cytotoxicity of the obtained compounds was written by Grymel, Miroslawa;Pastuch-Gawolek, Gabriela;Lalik, Anna;Zawojak, Mateusz;Boczek, Seweryn;Krawczyk, Monika;Erfurt, Karol. And the article was included in Molecules in 2020.Recommanded Product: 604-69-3 The following contents are mentioned in the article:

Pentacyclic lupane-type triterpenoids, such as betulin and its synthetic derivatives, e.g., I display a broad spectrum of biol. activity. However, one of the major drawbacks of these compounds as potential therapeutic agents is their high hydrophobicity and low bioavailability. On the other hand, the presence of easily transformable functional groups in the parent structure makes betulin to have a high synthetic potential and the ability to form different derivatives In this context, research on the synthesis of new betulin derivatives as conjugates of naturally occurring triterpenoid with a monosaccharide via a linker containing a heteroaromatic 1,2,3-triazole ring was presented. It has been shown that copper-catalyzed 1,3-dipolar azide-alkyne cycloaddition reaction (CuAAC) provides an easy and effective way to synthesize new mol. hybrids based on natural products. The chem. structures of the obtained betulin glycoconjugates were confirmed by spectroscopic anal. Cytotoxicity of the obtained compounds was evaluated on a human breast adenocarcinoma cell line (MCF-7) and colorectal carcinoma cell line (HCT 116). The obtained results show that despite the fact that the obtained betulin glycoconjugates do not show interesting antitumor activity, the idea of adding a sugar unit to the betulin backbone may, after some modifications, turn out to be correct and allow for the targeted transport of betulin glycoconjugates into the tumor cells. This study involved multiple reactions and reactants, such as (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3Recommanded Product: 604-69-3).

(2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Recommanded Product: 604-69-3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Antioxidant activity assessment of Yingjisha sweet almond oil was written by Zhao, Wei;Wang, Liwen;Yang, Fan;Zhang, Ning;Fan, Jiahuan;Qin, Shini;Shao, Tong;Xu, Xianao;Yan, Shiyin;Guo, Hongxing;Li, Jianying;Zhao, Hui. And the article was included in International Journal of Food Science and Technology in 2022.Related Products of 1731-94-8 The following contents are mentioned in the article:

Sweet almond is one of the main cash crops in Yingjisha, Xinjiang Autonomous Region, China. The composition of sweet almond oil (SAO) was analyzed by gas chromatog.-mass spectrometry (GC-MS). SAO′s antioxidant activities were investigated by measuring its scavenging ability with 1,1-diphenyl-2-picrylhydrazyl (DPPH), 2,2′-Azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), hydroxyl radical scavenging assay and 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid (Trolox) equivalent antioxidant capacity (TEAC) assay. Furthermore, in vivo antioxidant capacity was assessed using Saccharomyces cerevisiae model stimulated by hydrogen peroxide (H2O2) and carbon tetrachloride (CCl4). The results showed that SAO was mainly composed of Me oleate (21.28%), Me stearate (18.55%) and Me palmitate (14.1%). In vitro antioxidant test results showed that compared with the scavenging three free radicals capacity of 1 mmol L-1 Trolox, the SAO needed to reach 5 mg mL-1, 20 mg mL-1 and less than 20 mg mL-1, resp. In vivo experiments showed that SAO rescued the survival and inhibited intracellular oxidation and lipid peroxidation of Saccharomyces cerevisiae exposed to H2O2 and CCl4. Addnl., our results showed that the catalase encoded by the Gsh1 gene may be involved in the mechanism of action of SAO against intracellular oxidation These findings suggest that SAO possesses antioxidant capacities, and it is recommended to develop dietary antioxidants based on SAO. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Related Products of 1731-94-8).

Methyl nonadecanoate (cas: 1731-94-8) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Related Products of 1731-94-8

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Application of nano/micro-tubular cellulose of Indian origin for alcoholic fermentation and cold pasteurization of contaminated water was written by Kumar, Mrinal Nishant;Gialleli, Angelika-Ioanna;Bekatorou, Argyro;Koutinas, Athanasios A.;Kanellaki, Maria. And the article was included in LWT–Food Science and Technology in 2016.Formula: C20H40O2 The following contents are mentioned in the article:

The aim of this investigation was to study the use of nano/micro-porous cellulosic materials (tubular cellulose, TC) produced by delignification of mango (Magnifera indica L.), sal (Shorea robusta G.) sawdust and rice husk (Oryza sativa L.) in various food bioprocesses. Specifically, the porous structure of TC renders it suitable for use as filter material in continuous cold pasteurization processes as well as biocatalyst (carrier for yeast immobilization) for alc. fermentation Water contaminated with Saccharomyces cerevisiae or Lactobacillus bulgaricus cells was continuously pumped through TC filters. The effect of TC origin, type of contamination and microbial load on the operational stability of the system was assessed. The microbial load removal ranged between 99.9-88.2% and 92-77% for yeast and bacteria, resp. The system operated efficiently for up to 55 days. Filter regeneration was done with hot water. Scanning electron micrographs showed the entrapment of cells in the TC filters. The TCs were further used as S. cerevisiae immobilization carriers for alc. fermentation of grape must and glucose media at 15 掳C. Satisfactory fermentation rates, high ethanol content, ethanol productivity, and volatile byproducts formation were observed The TCs showed great potential for water pretreatment and food bioprocessing with simultaneous valorization of lignocellulosic biomass. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Formula: C20H40O2).

Methyl nonadecanoate (cas: 1731-94-8) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Esters contain a carbonyl center, which gives rise to 120掳 C鈥揅鈥揙 and O鈥揅鈥揙 angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C鈥揙鈥揅 bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Formula: C20H40O2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Synthesis of an ionic sugar-amino acid based surfactant in aqueous media was written by Esmaeilian, Nima;Dabir, Bahram;Malek, Reza Mohammad Ali;Arami, Mokhtar;Mazaheri, Firooz Mehr. And the article was included in Journal of Molecular Liquids in 2020.Safety of (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate The following contents are mentioned in the article:

Micellar catalysis has been used to synthesis a sugar-amino acid based cationic surfactant (N,N,N-trimethyl-2-oxo-2-(((2R,3S,4S,5R)-3,4,5-trihydroxy-6-(tetradecyloxy)tetrahydro-2H-pyran-2-yl)methoxy)ethan-1-aminium iodide) with renewable raw materials in aqueous media. The micellar catalysis method was compared with the method that uses DMF (DMF) as solvent. The results confirm the superiority of micellar catalysis method in terms of efficiency, energy consumption and environmental issues. Common physicochem. properties of surfactants like critical micelle concentration (CMC), the min. surface area per mol. (Amin) and Krafft temperature were determined to evaluate the behavior of synthesized surfactant properties at the air-water interface. Computational chem. method (DFT (B3LYP/6-311g(d)) was conducted to calculate the dimensional properties of the surfactant to determine the shape, size and aggregation number of micelles at their CMC by an approach that uses Connolly solvent accessible area as the effective area of surfactant head groups. Dynamic light scattering method (DLS) was used to determine the size of micelles. The results of DLS tests show good agreement with the calculation method. Finally, the biodegradability of synthesized natural based cationic surfactant was studied by close bottle standard test to investigate the biodegradation of synthesized surfactant. This study involved multiple reactions and reactants, such as (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3Safety of (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate).

(2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is 纬-valerolactone.Safety of (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Methylene blue loaded solid lipid nanoparticles: Preparation, optimization, and in-vivo burn healing assessment was written by Farmoudeh, Ali;enayatifard, Reza;Saeedi, Majid;Talavaki, Fatemeh;Ghasemi, Maryam;Akbari, Jafar;Nokhodchi, Ali. And the article was included in Journal of Drug Delivery Science and Technology in 2022.Product Details of 31566-31-1 The following contents are mentioned in the article:

Previous studies have shown that topical antioxidants are effective in controlling skin inflammation and accelerating tissue repair. Methylene blue with significant antioxidant effects was incorporated in solid lipid nanoparticles (MB-SLNs) and their impact on accelerating burn wound healing in a Wistar rat animal model was investigated. To this end, nanoparticles were prepared by ultra-sonication technique. The Box-Benken design (BBD) optimized the formulation variables, including lipid concentration, emulsifier/lipid, and sonication time. An in-vitro drug release test was performed using the dialysis tube technique, and the release kinetics was determined Partial-thickness burn wounds were induced in the skin of Wistar rats. Wound size reduction and histopathol. changes were assessed over 21 days. The optimum colloidal particles were spherical with an average size of 183.5 nm and entrapment efficiency of 75.24%. The difference between exptl. data and BBD prediction was less than 1%. The MB-SLNs release data followed the Korsmeyer-Peppas and Weibull models. Histol. results revealed that skin tissue recovery occurred significantly faster in the MB-SLNs treated group than simple methylene blue gel and neg. control. In conclusion, in-vivo studies proved that methylene blue nanoparticles with a high entrapment efficiency significantly accelerated the burn healing process. This study involved multiple reactions and reactants, such as Glyceryl monostearate (cas: 31566-31-1Product Details of 31566-31-1).

Glyceryl monostearate (cas: 31566-31-1) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Product Details of 31566-31-1

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Mechanistic evaluation of lymphatic targeting efficiency of Atazanavir sulfate loaded lipid nanocarriers: In-vitro and in-vivo studies was written by Desai, Jagruti;Thakkar, Hetal. And the article was included in Journal of Drug Delivery Science and Technology in 2022.Application of 31566-31-1 The following contents are mentioned in the article:

In the present study, Atazanavir sulfate-loaded solid lipid nanoparticles (ATZ-SLNs) were developed and characterized for oral bioavailability enhancement and lymphatic absorption. ATZ-SLNs were formulated by emulsion-solvent evaporation technique using hydrogenated castor oil and sodium oleate. The optimized formulation had a mean particle size of 190.1 卤 2.45 nm, the zeta potential of -42.63 卤 2.46 mV and entrapment efficiency of 94.26 卤 2.12%. Transmission electron microscopy and Field emission-SEM morphol. indicated discrete and round structures without aggregation. In-vitro drug release study showed controlled drug release of 80.36% in 12 h in simulated intestinal fluid. Cell-line study in Caco-2 cells showed increased permeability upon SLN formulation and mode of cellular uptake of SLN as clathrin and caveoli mediated endocytosis. In-vivo pharmacokinetic study in rats indicated increased oral bioavailability using ATZ-SLNs by 200% compared to suspension formulation. A lymphatic transport study revealed that SLNs were transported via lymphatic vessels. In organ biodistribution study, peyer’s patch region showed a 4.5 fold higher uptake of ATZ through ATZ-SLNs formulation than non-peyer’s patch region and high accumulation in spleen and brain. This delivery approach could maximize the drug concentrations to the lymphatic system leading to effective therapy for HIV. This study involved multiple reactions and reactants, such as Glyceryl monostearate (cas: 31566-31-1Application of 31566-31-1).

Glyceryl monostearate (cas: 31566-31-1) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is 纬-valerolactone.Application of 31566-31-1

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Catalytic deoxygenation of stearic acid and waste cooking oil over Pd/SBA-15 for obtaining hydrocarbons with potential as renewable liquid fuels was written by Pacheco-Sosa, Jose G.;Castillo-Escobedo, Anel I.;Chavarria-Hernandez, Juan C.;Diaz-Felix, Maria C.;Perez-Vidal, Hermicenda;Ordonez, Luis C.;Garcia-Davila, Jorge;Morales-Ortuno, Julio C.;Escobar, Beatriz. And the article was included in Journal of Porous Materials in 2019.Formula: C20H40O2 The following contents are mentioned in the article:

It has been found that catalytic deoxygenation of triglycerides is a viable pathway for obtaining renewable liquid fuels to contribute to meet the global energy demand. In this study, SBA-15 mesoporous silica was synthesized in a pure form and modified with mesitylene (TMB) as a swelling mol. (SBA15-TMB). Catalysts with 0.5, 1.5 and 3.0 wt% Pd were synthesized and tested by deoxygenation of stearic acid (SA), obtaining initial conversions of 68-98% that decreased to 36-73% after 6 h time-onstream. The most abundant product was n-heptadecane, with a selectivity of 鈭?90%. The most active catalyst evaluated with SA was 3.0 wt% Pd over unmodified SBA-15 (30Pd/SBA-15). Subsequently, fresh and regenerated 30Pd/SBA-15 catalysts were tested with waste cooking oil (WCO) feed, obtaining conversions of 74 and 72%, resp., but the fresh catalyst allowed a better oxygen removal (91%.Addnl., com. Pd 10wt%)/C catalyst was evaluated, obtaining results comparable to those for the regenerated 30Pd/SBA-15 catalyst. The main WCO reaction product for all catalysts was a diesel fraction (C12-C21), and the quality of the products was not very different, following the order: Pd(10wt%)/C > 3.0Pd/SBA-15-regenerated > 3.0Pd/SBA-15-fresh. The results obtained indicate that synthesized catalysts of this study are promising for obtaining renewable diesel from low-cost feeds while using low hydrogen consumption. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Formula: C20H40O2).

Methyl nonadecanoate (cas: 1731-94-8) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Esters contain a carbonyl center, which gives rise to 120掳 C鈥揅鈥揙 and O鈥揅鈥揙 angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C鈥揙鈥揅 bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Formula: C20H40O2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics