A new flavonoid glycoside from the stem barks of Premna fulva

A new flavonoid glycoside, named(2R)-naringenin-5-O-β-D- xylopyranosyl(1→6)-β-D-glucopyranoside( 1 ), together with other eight known compounds( 2-9 ), was isolated and characterized. Compounds 3-5 , 7-9 were isolated from the stem barks of Premna fulva for the first time. The anti-inflammatory activities of all the isolates were evaluated for their inhibitory effects against LPS-induced nitric oxide(NO)production in RAW 264. 7 macrophages cells. Compounds 2 , 6-9 exhibited moderate anti-inflammatory activities.