Chemical constituents from Cassia occidentalis Linn.

摘要

The present paper deals with the isolation and structural elucidation of three new compounds 1, 2 and 3 from the seeds of Cassia occidentalis Linn. These compounds have been characterized as 5, 7-dihydroxyflavone-5-O-β-D-xylopyranosyl-7-O-α-L-rhamnopyranosyl-(1→3)-O-α-L-arabinopyranoside (1), 3, 5, 7, 3' ,4'-pentahydroxy flavone-3-O-α-L-rhamnopyrano-syl-7-O-β-D-glucopyranosyl-(1→3)-O-β-D-xylopyranoside (2) and 5, 7, 3', 4'-tetrahydroxy-6-methoxyfiavone-5-O-α-L-ara-binopyranosyl-(1→4)-O-α-L-rhamnopyranosyl-(l→3)-O-β-D-galactopyranoside (3) respectively by various colour reactions, chemical degradations and spectral analysis. These compounds have been evaluated against various bacteria and fungi which showed good results.