A new flavonoid glucoside from Cassia angustifolia

A new flavonoid glucoside with a known one was isolated from the leaves of Cassia angustifolia. Based on the spectral analysis, including MS, H-1 NMR, C-13 NMR, DEPT,H-1-(HCOSY)-H-1, HMQC, HMBC and NOSEY, their chemical structures were determined as kaempferol-3-O-[(6'-O-trans-sinnapoyl)-beta-D-glucopyranosyI 1 -> 6)]-beta-D-glucopyranoside 1 and apigenin-6,8-di-C-glycoside 2. (C) 2008 Zhu Ju Wang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.