广东冬青中的三萜及三萜皂甙成分

从广东冬青（Ｉｌｅｘ ｋｗａｎｇｔｕｎｇｅｎｓｉｓ）的叶中分离得到四个三萜皂甙和三个三萜成分，通过光谱解析及化学方法，三个三萜成分分别鉴定为齐墩果酸（１）、熊果酸（２）和常春藤皂甙元（３）；四个三萜皂甙成分分别鉴定为齐墩果酸３－Ｏ－β－Ｄ－吡喃葡萄糖基－（１→３）－α－Ｌ－吡喃阿拉伯糖甙（４）、齐墩果酸３－Ｏ－β－Ｄ－吡喃葡萄糖基－（１→２）－α－Ｌ－吡喃阿拉伯糖甙（５）、齐墩果酸３－Ｏ－β－Ｄ－

TRITERPENOID SAPONINS AND TRITERPENES FROM ILEX KWANGTUNGENSIS

Four triterpenoid saponins along with three triterpenes, oleanolic acid (1), ursolicacid (2) and hederagenin (3) were isolated from the leaves of Ilex kwangtungensis. By spectro-sc opic and chemical methods, the structures of the four saponins were identified as 3-O-β-D-glucopyranosyl-(1→ 3)-α-L-arabinopyranosyl-oleanolic acid (4), 3-O-β-D-glucopyranosyl-(1→2)-a-L-arabinopy-ranosyl-oleanolic acid (5), 3-O-β-D-glucopyranosyl-(1→2)-β-D-glucopyranosy1-oleanolic acid (6) and 3-O-β-D-glucopyranosyl-(1→ 2)-β-D-galactopyranosyl-oleanolic acid (7).This paper is the first report of the chemical constituents from this plant.