Two novel C glycosylflavones, apigenin-6-C-α-L-arabinopyranosyl-(1-4)-α-L- rhamnopyranoside (hemsleyanoside, 1) and apigenin-8-C-α-L-arabinopyranosyl-(1-4) -α-L-rhamno-pyranoside(isohemsleyanoside), together with a known compound (apigenin-6,8-di-C-β-D-glucopyranoside, 3), were isolated from the 95% EtOH extract of Tetrastigma hemsleyanum Diels et Gilg. Their structures were elucidated by chemical evidence and spectral analysis.
三叶崖爬藤中的新黄酮碳甙
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