Two New Triterpenoid Glycosides from Leaves of Ilex chinensis SIMS

Abstract

Two new triterpenoid glycosides were isolated (one of them as the methyl ester) as major components from leaves of Ilex chinensis SIMS (Aquifoliaceae). The structures of these glycosides, termed ilexoside A (1) and ilexoside B methyl ester (2a), have been established to be 3β-Ο (β-D-xylopyranosyl) siaresinolic acid and 3β-Ο (β-D-xylopyranosyl) pomolic acid methyl ester, respectively, based on chemical and spectral evidence. High-resolution ¹³C-nuclear magnetic resonance data for the methyl ester of 1 (1a) and 2a are also reported.