Abstract: Eight compounds have been isolated from the aerial part of Ervatamia dwaracata (L.) Burk. Their chemical structures have been identified as cycloart - 23 - ene - 3β, 25 - diol (1), 3β - hydroxycy-cloart-25-ene-24-one (2) and cycloeucalenol (3), β - sitosterol, 3β - amyrin acetate, daucos-terol, ervatamine (4), tabemeamontanine (5) on the basis of spectral evidence. Three cycloartanes, cy-cloart - 23 - ene - 3, 25-diol (1), 3-hydroxycycloart-25-ene-24-one (2) and cycloeucalenol (3), are reported for the first time from the genus Ervatamia.

Key words: Ervatamia divaracata

摘要： 从二杈狗牙花（Ervatamia divaticata (L.)Burk ）中共分离出 8个已知化合物，分别为 3个环菠萝蜜烷型三萜：cycloart－23－ene－3β，25－diol（l），3β－hydroxycycloart－25－ene－24－one（2），cycloeucaleno（3）；2个吲哚生物碱ervatamine（4）和tabernaemontanine（5）；其他是β一谷甾醇，3β-乙酞-香树脂醇和胡萝卜甙。它们均由波谱方法鉴定。其中环菠萝蜜烷型三萜系首次被发现存在于狗牙花属植物中。

关键词: 二权狗牙花, 环菠萝蜜烷型三萜, 吲哚生物碱