采用硅胶柱层析，制备薄层层析等色谱方法，从乳香CO2超临界提取物中分得7个大环二萜类化合物，经波谱方法鉴定为incensole acetate (1)，incensole (2)，incensole oxide acetate (3)，isoincensole acetate (4)，incensole oxide (5)，isoincensole oxide (6)，isoincensolol (7)，其中，化合物7为新化合物，化合物4为首次从该属植物中分离得到。采用四甲基偶氮唑蓝(MTT)法观察化合物对肿瘤细胞的抑制增殖作用。

Seven macrocyclic diterpene compounds were isolated from Boswellia carterii Birdwood (Frankincense) and purified by silica-gel column chromatorgraphy and preparative thin-layer chromatography (TLC)。Their structures were elucidated as incensole acetate (1)，incensole (2)，incensole oxide acetate (3)，isoincensole acetate (4)，incensole oxide (5)，isoincensole oxide (6) and isoincensolol (7)。Compound 7 was a novel compound and compound 4 was isolated from this genus for the first time。Compounds 1～7 suppressing Bel-7402，Hela and SW-480 cells were investigated in vitro with cytotoxic activity.

湖南省科技厅资助项目（编号：06sk3001）