摘要：The major metabolites of Diopsyros melanoxylon viz. amyrins and ursolic acid and their lipophilic 3- O -fatty acid ester chains (C12—C18), which are synthesized now under mild esterification conditions in excellent yields (80—95%), were evaluated for their antimicrobial activity against a series of Gram positive and Gram negative bacteria. Significantly these compounds were found to exhibit potent activity against Gram negative bacteria Pseudomonas syringae (ATCC #13457) and fairly good activity against Gram positive bacteria, Bacillus sphaericus (ATCC #14577) and Bacillus subtilis (ATCC #6051).
