从膝瓣乌头根中分到七个二萜生物碱成分,其中碱Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ、Ⅵ分别鉴定为滇乌碱(1)、粗茎乌碱Ⅰ(2)、黄草乌碱丙(3)、它拉乌头胺(4)、展毛乌头宁(5)及8-去乙酰滇乌碱(6)。碱Ⅶ经MS、IR、~1HNMR、~(13)CNMR及其皂化产物鉴定为一新生物碱,命名为膝乌碱(7)。植物中主要成分为滇乌碱,约占干根重的0.78％。C_6具有羟基取代的乌头碱型酯碱为首次分到。 The seven diterpene alkaloids were identified from the roots of A. arborescens, in which bases I, II, III, IV, V, and VI were identified as dioscin (1), crude alkaloids I (2), and yellow, respectively. Aconitum (3), Itaconoxine (4), Zhanmao Wutouning (5) and 8-Acetyl Hyosine (6). Alkali VII was identified as a novel alkaloid by MS, IR, ~1H NMR, ~(13)CNMR and its saponification product, and was named as Klebine (7). The main component of the plant is eucalyptus, accounting for approximately 0.78% of the dry root weight. C_6 Aconitine-type ester base with hydroxyl substitution was firstly identified.