Phenolic derivatives from Wisteria sinensis sweet caulis

Objective: To study the phenolic derivatives from Wisteria sinensis. Methods: From the petroleum ether extraction of 95 %alcohol permeating extraction,12 compounds were isolated and purified with silica gel and Sephadex LH-20 column chromatography.Their structures were determined on the basis of physicochemical properties and spectroscopic analysis. Results: They were identified as formononetin( 1),( 3S)-vestitol( 2),( 6aS,11aS)-medicarpin( 3),( ±) isoduartin( 4),( 3S)-7,1'-dihydroxy-8,3'-dimethoxyisoflavan( 5),isosakuranetin( 6),p-hydroxy-benzaldehyde( 7),11b-hydroxy-11b,1-dihydromedicarpin( 8),3-hydroxy-medicarpin( 9),syringaresinol( 10),5-hydroxy-7-methoxychromone( 11),vanillin( 12). Conclusion: All the compounds are isolated from this plant for the first time.