Quercetin glycosides and sesquiterpenes from Phoebe poilanei Kosterm

Abstract

Four quercetin glycosides, quercetin 3-O-[α-L-rhamnopyranosyl-(1→6)-β-D-galactopyranoside] (1), quercetin 3-O-[α-L-rhamnopyranosyl-( 1→6)-β-D-glucopyranoside] (2), quercetin 3-O-α-L-rhamnopyranoside (3), quercetin 3-O-β-D-glucopyranoside (4), and two sesquiterpens alismol (5) and spathulenol (6) were isolated from the leaves of Phoebepoilanei Kosterm. Their chemical strictures were elucidated by analyses of their ESI-MS, 1D-NMR and 2D-NMR spectral data, and comparison with those reported in the literature. This is the first report of compound 1 from genus Phoebe.