Isoflavone glycosides from the root wood of Erythrina latissima

Abstract

The molecular structures of 3 isoflavone glycosides isolated from the root wood of Erythrina latissima were established as 4′-hydroxyisoflavone-7-O-β-D-glucopyranoside (compound 1); 4′-hydroxyisoflavone-7-O-α-L-rhamnosyl (1→6)-β-D-glucopyranoside (compound 2); and a new compound 4′, 8-dimethoxy isoflavone-7-O-α-L-rhamnosyl(1→6)-β-D-glucopyranoside (8-O-methylretusin-7-O-α-L-rhamnosyl (1→6)-β-D-glucopyranoside) (compound 3).