A new carotane sesquiterpene from Walsura robusta

试图从 Walsura robusta 的叶子学习化学成分。方法 W 的叶子。robusta 与 MeOH 被提取，混合物由硅石胶化， Rp-C18， Sephadex LH-20 和 semipreparative HPLC 孤立。这些混合物被广泛的分光镜的分析阐明(MS， NMR，红外，并且紫外) 。结果二 sesquiterpenoids 被获得，他们的结构作为 10-nitro-isodauc-3-en-15-al (1 ) 和 10-oxo-isodauc-3-en-15-al (2 ) 被识别。结论化合物 1 与一个 nitro 组一起是新的。1 和 2 第一次从类 Walsura 被孤立。

AIM： To study the chemical constituents from the leaves of Walsura robusta. METHODS： The leaves of W. robusta were extracted with MeOH and compounds isolated by silica gel, Rp-C18, Sephadex LH-20 and semipreparative HPLC. These com- pounds were elucidated by extensive spectroscopic analysis （MS, NMR, IR, and UV）. RESULTS： Two sesquiterpenoids were obtained and their structures were identified as 10β-nitro-isodauc-3-en-15-al （1） and 10-oxo-isodauc-3-en-15-al （2）. CONCLUSIONS： Com- pound 1 was new with a nitro group. 1 and 2 were isolated from genus Walsura for the first time.