Antibacterial, antioxidant and phytochemical screening of palestinian mallow, Malva Sylvestris L was written by Dowek, Sahar;Fallah, Seema;Basheer-Salimia, Rezq;Jazzar, Mohannad;Qawasmeh, Abdel. And the article was included in International Journal of Pharmacy and Pharmaceutical Sciences in 2020.Formula: C20H40O2 The following contents are mentioned in the article:
Objective: To evaluate antibacterial, antioxidant activities, the existence of the major secondary metabolites, and volatile compounds in methanolic extracts from M. sylvestris leaves. Methods: Antibacterial activity was assessed using a well diffusion method. Antioxidant activity was assessed using ABTS•+and DPPH• free radical scavenging assays. Phytochem. screening for secondary metabolites and volatile compounds were done following standard techniques and gas chromatog.-mass spectrometry (GC-MS). Results: Methanolic extracts exhibited moderate antibacterial activity compared with the pos. control against the gram-neg. Klebsiella pneumoniae and the gram-pos. bacteria′s Staphylococcus aureus by 47.2 and with 47.1% resp. The average percentage of scavenging was 97.82 ± 0.05 and 79.49 ± 0.4 for ABTS•+ and DPPH•, correspondingly. Total phenols were quant. estimated and found to be 78.9 ± 9.55 mg GAE/g. Phytochem. screening assays revealed the presence of a wide range of phytochem. groups such as alkaloids flavonoids, phenols, tannins, quinones, saponins, steroids, tannins, terpenoides with at least sixteen volatile compounds detected in the plant. Conclusion: The present study confirmed the antioxidant activity of the methanolic extract of M. sylvestris and the existence of is the volatile compounds (phytol), which mediate, even partially, the antioxidant and the claimed analgesic activity of the plant. 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° 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. Formula: C20H40O2
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics