Investigation on flavonoids from fruits of Illicium oligandrum / 中草药

ABSTRACT

Objective To isolate and identify the flavonoids from the fruits of Illicium oligandrum.Methods The flavonoids were isolated by silica-gel,Sephadex LH-20,and ODS column chromato-graphies.Their structures were elucidated by 1H-NMR,13CNMR,and ESI-MS.Results Eleven flavonoids were isolated and identified as kaempferol(Ⅰ),quercetin(Ⅱ),quercetin-3-O-?-D-galactopyranoside(Ⅲ),isorhamnetin-3-O-?-D-glucopyranoside(Ⅳ),quercetin-3-O-?-L-arabinopy-ranoside(Ⅴ),quercetin-3O-?-L-rhamnopyranoside(Ⅵ),dihydroquercetin-3O-?-L-rhamnopyranoside(Ⅶ),dihydrokaempferol-3O-?-L-rhamnopyranoside(Ⅷ),quercetin-3O-?-D-(6″-O-?-L-rhamnopy-ranosyl) glucopyranoside(Ⅸ),kaempferol-3-O-?-D-(6″-O-?-L-rhamnopyranosyl) glucopyranoside(Ⅹ),isorhamnetin-3-O-?D-(6″-O-?-L-rhamnopyranosyl) glucopyranoside(Ⅺ).Conclusion All these compounds are firstly obtained from the plants of fruits of I.oligandrum and compounds Ⅳ,Ⅴ,Ⅶ,Ⅷ,and Ⅺ are isolated from the plants of Illicium L.for the first time.