Gallic acid esters from the stem bark of <i>Mimusops elengi</i> L.
作者:Nida Akhtar、Mohd. Ali、Mohd. Sarwar Alam
DOI:10.1080/14786410902833989
日期:2010.6.15
Phytochemical investigation of the ethanolic extract of the stem bark of Mimusops elengi L. (Sapotaceae) led to the isolation of new gallic acid esters, characterised as phenyl propanoxyl gallate (1), -D-glucopyranosyl (6'1'')--D-glucopyranosyl-4''-(4''-ethylphenyl) gallate (2), 2'-(1'''-geranyloxy)--D-glucopyranosyl (6'1'')--D-glucopyranosyl-4''-phenoxy gallate (3), -D-glucopyranosyl (6'1'')--D-glucopyranosyl 3,4,5-trihydroxy benzoate (4), -D-glucopyranosyl-(6'1'')--D-glucopyranosyl-4''-(4'''-n-butylphenyl) 3,4,5-trihydroxy benzoate (5), -D-glucopyranosyl(6'1'')--D-rhamnosyl 3,4,5-trihydroxy benzoate (6) and -D-(2'-phenyl glucopyranosyl)-(6'1'')-(2'', 4''-diphenylrhamnopyranosyl)-3,4,5-trihydroxylbenzoate (7), along with the known compounds: farnon-3-one, stigmasta-5-en-3--ol, olean-18-en-2-one-3-ol, lup-20(29)-en-3-ol and stigmasta-5-en-3-D-glucopyranoside. Their structures were elucidated on the basis of spectroscopic analyses and chemical reactions.