目的　研究垂枝赤桉Eucalyptuscamaldulensisvar.pendulaBlak .etJacobs叶的化学成分。 方法　采用各种色谱技术进行分离纯化 ,用IR ,MS ,1HNMR ,13CNMR(DEPT) ,1H 1HCOSY ,13C 1HCOSY ,COLOC和X 射线单晶衍射鉴定化合物。结果　分离得到了 5个化合物 :三十烷醇 (I) ,β 谷甾醇 (II) ,对羟基苯甲酸 (III) ,胡萝卜苷(IV) ,5 ,7 二羟基 2 甲基 苯骈吡喃酮 7 O β D { 6 O [4R (1 甲基 1 羟基 ) 乙基环己 1 烯 ] 甲酰基 } 吡喃葡糖(V)。结论　所有化合物均为首次从该植物中分得 ,V为一个新化合物 ,命名为桉叶苷 (camaldulenside) Objective To study the chemical composition of Eucalyptus camaldulensisvar.pendulaBlak.etJacobs leaves. Methods The compounds were isolated and purified by various chromatographic techniques. The compounds were identified by IR, MS, 1HNMR, 13CNMR(DEPT), 1H 1HCOSY, 13C 1HCOSY, COLOC and X-ray single crystal diffraction. As a result, five compounds were isolated: triacontanol (I), β-sitosterol (II), p-hydroxybenzoic acid (III), carotenoid (IV), 5, 7 dihydroxy-2-methylbenzopyrone 7 O β D {6 O [4R (1 methyl 1 hydroxy) ethylcyclohexene]formyl} glucopyranose (V). Conclusion All compounds were isolated from this plant for the first time. V is a new compound named as campalid (camaldulenside).