中文摘要：

目的研究肺筋草Aletrisspicata全草的化学成分。方法利用正、反相硅胶柱色谱、薄层色谱、SephadexLH一20柱色谱及半制备高效液相色谱等方法进行分离纯化，然后根据理化性质和波谱数据鉴定化合物的结构，并对其中的三萜类化合物（化合物1～3）进行了抗肿瘤活和抗菌活性初步筛选。结果从肺筋草的干燥全草中分离得到了9个化合物，分别鉴定为24-甲基-9，19-环羊毛甾-24-烯-3-醇（1）、24-甲基-9，19．环羊毛甾-25-烯-3-醇（2）、24，24-二甲基．环木菠萝烷-3-醇（3）、美商陆酚A（4）、异美商陆酚A（5）、9＇-methylamericanolA（6）、1-（4r_羟基苯基）-7-（3”-甲氧基-4＂-羟基苯基）-4-烯-3-庚酮（7）、methyl-9．12．13-trihydroxyoctadeca-10E，15Z-dienoate（8）、5-羟甲基-2-呋喃甲醛（9）。结论所有化合物均为首次从该属植物中分离得到。化合物1～3无抗肿瘤和抗菌活性。

英文摘要：

Objective To study the chemical constituents ofAletris spicata. Methods The compounds were isolated and repeatedly purified by silica gel, TLC, and Sephadex LH-20 column chromatography as well as semi-Prep HPLC, and their structures were elucidated by means of spectral analysis and physicochemical properties. The antitumor and antibacterial activities of triterpenoids （compounds 1--3） were primarily screened. Results Nine compounds were obtained and identified as 24-methyl-9, 19-cyclolanost- 24-en-3-ol （1）, 24-methyl-9, 19-cyclolanost-25-en-3-ol （2）, cycloneolitsol （3）, americanol A （4）, isoamericanol A （5）, 9＇-methyl americanol A （6）, 1-（4＇-hydroxyphenyl）-7-（Y＇-methoxyl-4＂-hydroxyphenyl）-heptene-4-en-3-one （7）, methyl-9, 12, 13-trihydroxy- octadeca-10E, 15Z-dienoate （8）, and 5-hydroxymethyl-2-furancarboxaldehyde （9）. Conclusion All the compounds are isolated from the plants in Aletris L. for the first time. No anti-tumor and anti-bacterial activities are found in compounds 1--3.