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.
从冬青属植物枸骨叶(冬青科)中分离得到两种新的三萜
皂苷类化合物(其中一种是甲酯),它们是主要成分。根据
化学和光谱数据,确定这两种化合物的结构分别为3β-Ο(β-D-木
吡喃糖基)siaresinolic酸和3β-Ο(β-D-木
吡喃糖基)pomolic酸甲酯,分别命名为ilexoside A(1)和ilexoside B甲酯(2a)。还报道了1的甲酯(1a)和2a的高分辨率13C-核磁共振数据。