目的 :寻找番荔枝科假鹰爪属植物大叶假鹰爪的抗肿瘤活性成分。方法 :硅胶柱色谱法分离 ,理化性质及波谱分析等方法鉴定结构。结果 :从石油醚和氯仿萃取物中分离鉴定了 6个化合物 ,为 5 ,7 二羟基 6 甲酰基 8 甲基双氢黄酮、5 ,7 二羟基 8 甲酰基 6 甲基双氢黄酮、去甲氧杜鹃花素、苯甲酸、β 谷甾醇和豆甾醇。 结论 :均为本植物中首次分得 ,3个双氢黄酮均为A 环全取代、B 环未取代 ,具有假鹰爪属植物黄酮类成分的特征性。 Objective : To find out the antitumor active components of the false hawk claw of Anatidae. Methods : Separation by silica gel column chromatography, physical and chemical properties and spectral analysis were used to identify the structure. Results: Six compounds were identified from petroleum ether and chloroform extracts as 5,7 dihydroxy 6 formyl 8 methyl dihydroflavone, 5,7 dihydroxy 8 formyl 6 methyl dihydroflavone, and a Oxygen rhododendron, benzoic acid, beta sitosterol and stigmasterol. Conclusion : All of them were firstly obtained in this plant. All three flavanones were substituted by A ring and B ring was unsubstituted. It is characteristic of the flavonoids of the genus Falcon.