Abstract

Two new potential allelochemicals have been isolated from methanolic extract of the stems of Crotalaria medicaginea Lam. Along with three known compounds Quercitrin, Acacetin and Isorhamnetin. The structure of two new allelochemicals were characterized as 3,5,7,3',4'-pentahydroxy-6-methoxyflavone-3-O-α-L-rhamnopyranosyl-7-O-β-D-glucopyranosyl-(1?4)-O-β-D-xylopyranoside (1) and 3, 5, 7-trihydroxy-8,4'-dimethoxyflavone-5-O-β-D-galactopyranosyl-7-O-α-L-rhamnopyranosyl-(1→3)--arabinopyranoside (2) by various colour reactions, spectral analysis and chemical degradations.

Keywords

Crotalaria medicaginea Lam., Leguminosae, Allelochemical, Antimicrobial activity