目的　研究月腺大戟的化学成分。方法　运用柱层析进行分离 ,并对所分得的化合物运用波谱数据进行了结构解析。结果　从月腺大戟中分离得到 6个化合物并鉴定了其结构 ,分别为 :baccatin (1) ,3 乙酰 β香树酯醇 (2 ) ,3,3′ 二乙酰基 4 ,4′ 二甲氧基 2 ,2′ ,6 ,6′ 四羟基二苯甲烷 (3) ,2 ,4 二羟基 6 甲氧基 3 甲基苯乙酮 (4 ) ,β 谷甾醇 (5 ) ,胡萝卜苷 (6 )。 结论　baccatin为首次从月腺大戟中分离得到 Objective To study the chemical constituents of G. glauca. Methods Separation was performed by column chromatography, and structural analysis was performed using the spectral data of the separated compounds. RESULTS Six compounds were isolated from L. grandis and their structures were identified as: baccatin (1), 3 acetyl β-scholaryl alcohol (2 ), 3,3′ diacetyl 4, 4′ dimethyl Oxygen 2,2’,6,6’-tetrahydroxydiphenylmethane (3), 2,4 dihydroxy 6-methoxy-3-methylacetophenone (4), β-sitosterol (5), carotenoid (6 ). Conclusion baccatin is the first isolated from lunate glands