Month: November 2022

Matsuzaki, Kei; Yamamoto, Iwao; Enomoto, Koji; Kaneko, Yutaro; Mimura, Tohru; Shiio, Tsuyoshi published the artcile< Synthesis of antitumor polysaccharides>, COA of Formula: C19H34O2, the main research area is antitumor polysaccharide preparation.

Previously, several antitumor polysaccharides having D-glucopyranose, D-mannopyranose, D-arabinofuranose, or its oligomer as side chains of (1→3)- β-glucan, or (1→4)-β-glucan were synthesized by the orthoester method as models of natural antitumor polysaccharides, such as lentinan, etc. Some of these have indicated high antitumor activity against sarcoma 180 implanted into mice, to the same extent as the natural polysaccharides. In this report, water soluble, branched polysaccharides having L-arabinofuranose or its oligomer, L-arabinopyranose, or D-galactopyranose as side chains were synthesized, and their structures and antitumor activities were determined, in order to investigate the effect of the kind of side chains on the antitumor activity. These synthetic polysaccharides showed high antitumor activity.

Polymer Science and Technology (Plenum) published new progress about Antitumor agents. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, COA of Formula: C19H34O2.

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

Meiorin, Cintia; Calvo-Correas, Tamara; Mosiewicki, Mirna Alejandra; Aranguren, Mirta Ines; Corcuera, Maria Angeles; Eceiza, Arantxa published the artcile< Comparative effects of two different crosslinkers on the properties of vegetable oil-based polyurethanes>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is crosslinked polyol based polyurethane comparative preparation property.

Thermoset polyurethanes (PUs) were prepared from a polyol derived from castor oil, 4,4′;-methylene di-Ph diisocyanate (MDI) and different trifunctional low-mol.-weight crosslinkers, biobased glycerol (Gly) and petroleum-derived trimethylolpropane (TMP). The synthesis was carried out in bulk and without catalyst via one-step polymerization varying the components equivalent weight ratio, Polyol:MDI:Gly and Polyol:MDI:TMP, resp. The physicochem., morphol., thermal, dynamic-mech., and mech. properties of the PUs were determined The success of the reaction between the polyol and MDI was confirmed by Fourier transform IR spectroscopy. The dynamic-mech. and the mech. properties as well as hardness were determined and related to the concentration of the low-mol.-weight crosslinkers utilized (Gly or TMP). However, important differences were observed between the synthesized two series, due to phase separation produced during the curing reaction, which affected more the materials prepared from TMP. SEM images and dynamic-mech. results confirmed this difference, related to the reactivity of primary and secondary hydroxyls present in the crosslinkers. Thermogravimetric anal. also showed to be sensible to the different structure of the crosslinkers with TMP leading to more thermally stable samples. Finally, measurements of water contact angle indicated that the surfaces were mostly hydrophobic with minor differences between the samples.

Journal of Applied Polymer Science published new progress about Complex modulus, tan δ. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

De Vrieze, Jana; Van Herck, Simon; Nuhn, Lutz; De Geest, Bruno G. published the artcile< Design of pH-degradable polymer-lipid amphiphiles using a ketal-functionalized RAFT chain transfer agent>, Formula: C9H3F5O2, the main research area is pH polymer lipid amphiphile ketal RAFT chain transfer agent; amphiphiles; degradability; ketal; lipid conjugation; reversible addition-fragmentation chain transfer.

Conjugation of small mol. drug to lipid-polymer amphiphiles is a powerful strategy to alter the pharmacokinetic profile of these mols. by promoting binding to albumin or other serum mols. Incorporation of a responsive linker between the lipid anchor and the polymer chain can be of interest to avoid indefinite binding of the conjugates to hydrophobic pockets of serum proteins or phospholipid membranes when reaching a target cell or tissue. Here, the synthesis of pH-sensitive lipid-polymer conjugates by reversible addition-fragmentation chain transfer (RAFT) polymerization using a RAFT chain transfer agent that is equipped with a pH-sensitive ketal bond between a cholesterol moiety and the trithiocarbonate RAFT chain transfer group is reported. It is demonstrated that in native form these conjugates exhibit a high affinity to albumin and cell membranes but loose this ability in response to a mild acidic trigger in aqueous medium.

Macromolecular Rapid Communications published new progress about Albumins Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Formula: C9H3F5O2.

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

Schierle, Simone; Chaikuad, Apirat; Lillich, Felix F.; Ni, Xiaomin; Woltersdorf, Stefano; Schallmayer, Espen; Renelt, Beatrice; Ronchetti, Riccardo; Knapp, Stefan; Proschak, Ewgenij; Merk, Daniel published the artcile< Oxaprozin Analogues as Selective RXR Agonists with Superior Properties and Pharmacokinetics>, Formula: C9H7F3O2, the main research area is oxaprozin analog RXR agonist pharmacokinetic SAR.

The retinoid X receptors (RXR) are ligand-activated transcription factors involved in multiple regulatory networks as universal heterodimer partners for nuclear receptors. Despite their high therapeutic potential in many pathologies, targeting of RXR has only been exploited in cancer treatment as the currently available RXR agonists suffer from exceptional lipophilicity, poor pharmacokinetics (PK), and adverse effects. Aiming to overcome the limitations and to provide improved RXR ligands, we developed a new potent RXR ligand chemotype based on the nonsteroidal anti-inflammatory drug oxaprozin. Systematic structure-activity relationship anal. enabled structural optimization toward low nanomolar potency similar to the well-established rexinoids. Cocrystal structures of the most active derivatives demonstrated orthosteric binding, and in vivo profiling revealed superior PK properties compared to current RXR agonists. The optimized compounds were highly selective for RXR activation and induced RXR-regulated gene expression in native cellular and in vivo settings suggesting them as excellent chem. tools to further explore the therapeutic potential of RXR.

Journal of Medicinal Chemistry published new progress about Crystal structure. 2557-13-3 belongs to class esters-buliding-blocks, and the molecular formula is C9H7F3O2, Formula: C9H7F3O2.

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

Emad, Ayat M.; Rasheed, Dalia M.; El-Kased, Reham F.; El-Kersh, Dina M. published the artcile< Antioxidant, Antimicrobial Activities and Characterization of Polyphenol-Enriched Extract of Egyptian Celery (Apium graveolens L., Apiaceae) Aerial Parts via UPLC/ESI/TOF-MS>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is Apium graveolens antioxidant antimicrobial polyphenol UPLCESITOFMS; Apium graveolens; UPLC/ESI/TOF-MS; antimicrobial; antioxidant; celery.

Medicinal plant extracts are increasingly considered a major source of innovative medications and healthcare products. This study focused on preparing a polyphenol enriched water extract of Egyptian celery “”Apium graveolens L., Apiaceae”” aerial parts (TAE) in an endeavor to accentuate its antioxidant capacity as well as its antimicrobial activity. (TAE) of celery was partitioned against different organic solvents to yield dichloromethane (DCM), Et acetate (EAC), and butanol (BUOH) fractions. (TAE) and the organic fractions thereof besides the remaining mother liquor (ML) were all screened for their antioxidant capacity using various protocols viz. monitoring the reducing amplitudes for ferric ions (FRAP), and radical scavenging potentials of oxygen (ORAC), 2,2′-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS), 2,2-diphenyl-1-picrylhydrazyl (DPPH), and metal chelation assays. The examination procedure revealed both (TAE) extract and (DCM) fraction, to pertain the highest antioxidant potentials, where the IC50 of the (TAE) using ABTS and metal chelation assays were ca. 34.52 ± 3.25 and 246.6 ± 5.78μg/mL, resp. The (DCM) fraction recorded effective results using the FRAP, ORAC, and DPPH assays ca. 233.47 ± 15.14 and 1076 ± 25.73μM Trolox equivalent/mg sample and an IC50 474.4 ± 19.8μg/mL, resp. Addnl., both (TAE) and (DCM) fraction exerted antimicrobial activities recording inhibition zones (mm) (13.4 ± 1.5) and (12.0 ± 1.0) against Staphylococcus aureus and (11.0 ± 1.2) and (10.0 ± 1.3) against Escherichia coli, resp., with no anti-fungal activity. Min. inhibitory concentration (MIC) of (TAE) and (DCM) fraction were 1250 and 2500μg/mL, resp. UPLC/ESI/TOF-MS unveiled the chem. profile of both (TAE) and (DCM) fraction to encompass a myriad of active polyphenolic constituents including phenylpropanoids, coumarins, apigenin, luteolin, and chrysoeriol conjugates.

Molecules published new progress about Aliphatic acids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Jouandin, Patrick; Marelja, Zvonimir; Shih, Yung-Hsin; Parkhitko, Andrey A.; Dambowsky, Miriam; Asara, John M.; Nemazanyy, Ivan; Dibble, Christian C.; Simons, Matias; Perrimon, Norbert published the artcile< Lysosomal cystine mobilization shapes the response of TORC1 and tissue growth to fasting>, COA of Formula: C19H34O2, the main research area is Drosophila TORC1 tissue growth lysosomal cystine fasting mitochondria.

Adaptation to nutrient scarcity involves an orchestrated response of metabolic and signaling pathways to maintain homeostasis. We find that in the fat body of fasting Drosophila, lysosomal export of cystine coordinates remobilization of internal nutrient stores with reactivation of the growth regulator target of rapamycin complex 1 (TORC1). Mechanistically, cystine was reduced to cysteine and metabolized to acetyl-CoA (acetyl-CoA) by promoting CoA metabolism In turn, acetyl-CoA retained carbons from alternative amino acids in the form of tricarboxylic acid cycle intermediates and restricted the availability of building blocks required for growth. This process limited TORC1 reactivation to maintain autophagy and allowed animals to cope with starvation periods. We propose that cysteine metabolism mediates a communication between lysosomes and mitochondria, highlighting how changes in diet divert the fate of an amino acid into a growth suppressive program.

Science (Washington, DC, United States) published new progress about Adipose tissue. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, COA of Formula: C19H34O2.

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

Zheng, Yucheng; Hu, Qingcai; Wu, Zongjie; Bi, Wanjun; Chen, Bin; Hao, Zhilong; Wu, Liangyu; Ye, Naixing; Sun, Yun published the artcile< Volatile metabolomics and coexpression network analyses provide insight into the formation of the characteristic cultivar aroma of oolong tea (Camellia sinensis)>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is Camellia sinensis volatile metabolomics coexpression network analysis.

Finished oolong tea products with distinctly characteristic cultivar aromas generally have higher economic value. To advance our understanding of the aromatic differences between Camellia sinensis cv. Tieguanyin (TGY) and Jinguanyin (JGY) cultivars and their underlying formation mechanism, volatile metabolomics anal., electronic nose (EN) anal., sensory evaluation, and RNA sequencing were performed during this study. The EN and sensorial anal. showed a significant difference in odor characteristics between the two cultivars, which featured sweet floral and fruity aromas and green floral aromas, resp. A metabolomics anal. of tea products showed that linalool (floral, OAV = 50.6) and geraniol (rose-like and sweet, OAV = 1.9) may contribute to the characteristic aroma. The volatile determination at each stage during the oolong tea manufacturing process emphasized that the significant difference in linalool and geraniol contents in fresh leaves from the two cultivars and the increase rate were potential reasons for their characteristic aroma and suggested that the “”Tanqing”” treatment clarified and intensified the characteristic cultivar aroma. A linalool synthase CsLIN with the expected catalytic activity was identified by coexpression network analyses. Collectively, our work pinpoints two key aroma substances within two cultivars and elaborates on the potential cause of characteristic cultivar aroma formation.

LWT–Food Science and Technology published new progress about Camellia sinensis. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Tamura, Yasumitsu; Tsunekawa, Masayoshi; Miyamoto, Tomohisa; Ikeda, Masazumi published the artcile< Syntheses and some properties of 4-acyl-1-methyl-2-azathiabenzene 1-oxides>, COA of Formula: C19H34O2, the main research area is azathiabenzene oxide; thiabenzene aza oxide; thiazine oxide; acylvinylsulfoximine cyclization; sulfoximine acylvinyl cyclization.

4-Acyl-1-methyl-2-azathiabenzene 1-oxides I [R = H, R1 = Me, OEt, R2 = Me; RR1 = (CH2)3, R2 = Me; R = R1 = Me, R2 = H] were prepared by base catalyzed cyclization of N-(2,2-diacylvinyl)dimethylsulfoximines which, in turn, were obtained by the reactions of (MeCO)2C:CHOEt, EtOCH:C(CO2Et)2, MeCOC(:CHOEt)CO2Et, and 2-acetyl-3-methoxy-2-cyclohexen-1-one with dimethylsulfoximine. Comparison of the phys. and chem. properties of the azathiabenzene 1-oxides with those of the corresponding 4-acyl-1-methylthiabenzene 1-oxides II suggests that both the ylidic and betaine like properties of the 2-azathiabenzene 1-oxides are much lower than those of the latter.

Journal of Organic Chemistry published new progress about Cyclization. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, COA of Formula: C19H34O2.

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

Balaratnam, Sumirtha; Rhodes, Curran; Bume, Desta Doro; Connelly, Colleen; Lai, Christopher C.; Kelley, James A.; Yazdani, Kamyar; Homan, Philip J.; Incarnato, Danny; Numata, Tomoyuki; Schneekloth, John S. Jr published the artcile< A chemical probe based on the PreQ1 metabolite enables transcriptome-wide mapping of binding sites>, Related Products of 112-63-0, the main research area is PreQ metabolite chem probe transcriptome binding site mapping.

The role of metabolite-responsive riboswitches in regulating gene expression in bacteria is well known and makes them useful systems for the study of RNA-small mol. interactions. Here, we study the PreQ1 riboswitch system, assessing sixteen diverse PreQ1-derived probes for their ability to selectively modify the class-I PreQ1 riboswitch aptamer covalently. For the most active probe (11), a diazirine-based photocrosslinking analog of PreQ1, X-ray crystallog. and gel-based competition assays demonstrated the mode of binding of the ligand to the aptamer, and functional assays demonstrated that the probe retains activity against the full riboswitch. Transcriptome-wide mapping using Chem-CLIP revealed a highly selective interaction between the bacterial aptamer and the probe. In addition, a small number of RNA targets in endogenous human transcripts were found to bind specifically to 11, providing evidence for candidate PreQ1 aptamers in human RNA. This work demonstrates a stark influence of linker chem. and structure on the ability of mols. to crosslink RNA, reveals that the PreQ1 aptamer/ligand pair are broadly useful for chem. biol. applications, and provides insights into how PreQ1, which is similar in structure to guanine, interacts with human RNAs.

Nature Communications published new progress about Aptamers. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Related Products of 112-63-0.

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

Prior, S.; Wiegrebe, W. published the artcile< Intramolecular von Braun-reaction: evidence of inversion>, Related Products of 617-55-0, the main research area is von Braun degradation stereochem; cyanogen bromide benzylisoquinoline derivative; ozonolysis phenylisochromane derivative.

(R)-I and BrCN gave II which on ozonolysis gave 1,3-dimethylimidazolidine-2,4,5-trione and (S)-malic acid. The formation of the latter compound proved that inversion occurred in the von Braun degradation of (R)-I.

Scientia Pharmaceutica published new progress about Decomposition, von Braun. 617-55-0 belongs to class esters-buliding-blocks, and the molecular formula is C6H10O5, Related Products of 617-55-0.

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