Chemical constituents from Glochidion assamicum

Phytochemical investigation of aerial parts of Glochidion assamicum Hook. f. led to the isolation of one new triterpenoid saponin, 3-O-[beta-glucopyranosyl-(1 -> 3)-alpha-arabinopyranosyl]-gymnestrogenin (assamicoside A, 7), and ten known compounds (1-6, 8-11). Their structures were identified by spectroscopic analysis and by comparison of their spectral data with those reported in the literature. The chemotaxonomic analysis is in agreement with previous work on the constituents of other Glochidion species. A spirostane-type C-27 steroid (4) isolated from G. assamicum for the first time can be used to differentiate this species from other Glochidion. (C) 2013 Elsevier Ltd. All rights reserved.