密脉鹅掌柴的化学成分研究(Ⅰ)

Studies on chemical constituents from Schefflera venulosa(Ⅰ)

对密脉鹅掌柴进行了化学成分研究．采用硅胶柱色谱、RP-C8柱色谱等方法分离化学成分，1H NMR，13CNMR等方法进行结构鉴定，从中分离鉴定了4个化合物：14-羟甲基-3-氧-口-D-吡喃葡萄糖醛酸基（1→2）-β-D-吡喃鼠李糖基齐墩果酸苷（1），绿原酸（2），异绿原酸C（3），莱蓟素（4）．化合物1为新化合物，化合物2-4均为首次从该植物中分离得到．

The chemical components of Schefflera venulosa were studied. The constituents were isolated by silica gel and RP -C8 column chromatography and the 1H NMR, 13C NMR spectroscopic analysis were employed for the structural elucidation. Four compounds were isolated from the complete herb of Schefflera venulosa, their structures were elucidated as 14 - epihederagenin - 3 - O [β - D - glucosiduronidyl （ 1 →2 ） -β - D - rham- nopyranosyl ] oleanolic acid,chlorogenic acid. Compounds 1 is a new trierpenoid saponin while compounds 2-4 were isolated from the plant for the first time.