New bioactive mono-acyl glycerol ester from the Red Sea marine coral Sclerophytum levi.

The chemical examination of the soft coral Sclerophytum levi collected from the Red Sea led to isolation and structurally elucidation of a new mono- acyl glycerol ester, [(2R)-2,3-dihydroxypropyl] (2R)-2-hydroxypentadecanoate (1), along with myristyl palmitate (2), (Z)-2-(9-octadecenyloxy) ethanol (3), 24-methylene cholesterol (4) and 23-demethylgorgosterol (5). The chemical composition of the isolated metabolites was determined via optimised spectroscopic analysis, including 1D and 2D NMR analyses. The new mono alkyl glycerate (m-AG) showed moderate antimicrobial activity against Staphylococcus aureus, Proteus vulgaris, Escherichia coli and Candida albicans microbial strains using agar well diffusion method and recorded a weak in vitro cytotoxic and antioxidant activities.