Flavonoit glycosit từ cây cách thư Poilanei Fissistigma poilanei (Ast) Tsiang & P. T. Li], họ na (Annonaceae)

Three flavonoid glycosides: (2R,3R)-3’,4’,5,7-tetrahydroxydihydroflavonol-3-O-a-L rhamnopyranoside ( 1 ), (+)-catechin 3-O-a-L-rhamnopyranoside ( 2 ) and quercetine 3,7 dimethoxy-3’-O-a-L-rhamnopyranosyl-(1 ® 2)-b-D-glucopyranoside  ( 3 ) were isolated from the ethyl acetate extract of Fissistigma poilanei. Their structures were elucidated by analysis of MS and NMR spectra and comparison with the published data.