Four new compounds from the rhizome of Aristolochia championii.

Three new flavonoid glycosides (1–3) and one new aristololactamN-glycoside (4) were isolated from the rhizome ofAristolochia championii. The structures of compounds1–4were elucidated on the basis of their spectroscopic data and chemical evidence (UV, IR, HR-ESI-MS, 1D and 2D NMR). Their structures were determined as 8-(5-formyl-2-furanmethyl)-isorhamentin 3-O-robinobioside (1), 8-(5-methyl-2-furanoyl)-isorhamentin 3-O-robinobioside (2), 8-formylisorhamentin 3-O-robinobioside (3), and N-β-D-glucopyranosylaristololactam V (4), respectively. [ABSTRACT FROM PUBLISHER]