Gallic acid esters from the stem bark of Mimusops elengi L

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), beta-D-glucopyranosyl (6'-->1'')-beta-D-glucopyranosyl-4''-(4''-ethylphenyl) gallate (2), 2'-(1'''-geranyloxy)-beta-D-glucopyranosyl (6'-->1'')-beta-D-glucopyranosyl-4''-phenoxy gallate (3), beta-D-glucopyranosyl (6'-->1'')-beta-D-glucopyranosyl 3,4,5-trihydroxy benzoate (4), beta-D-glucopyranosyl-(6'-->1'')-beta-D-glucopyranosyl-4''-(4'''-n-butylphenyl) 3,4,5-trihydroxy benzoate (5), beta-D-glucopyranosyl(6'-->1'')-beta-D-rhamnosyl 3,4,5-trihydroxy benzoate (6) and beta-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-beta-ol, olean-18-en-2-one-3-ol, lup-20(29)-en-3beta-ol and stigmasta-5-en-3beta-D-glucopyranoside. Their structures were elucidated on the basis of spectroscopic analyses and chemical reactions.