A new aristolactam alkaloid from the stems of Dasymaschalon trichophorum

AIM:To study the chemical constituents of the stem of Dasymaschaon trichophorum Merr.METHODS:The compounds were isolated and purified by the methods of various chromatography.Their structures were elucidated on the basis of spectroscopic methods.RESULTS:Five aristolactam alkaloids were obtained and their structures were identified as 10-amino-3,6-dihydroxy-2,4-dimethoxyphenanthrene-1-carboxylic acid lactam(1),enterocarpam-Ⅱ(2),oldhamactam(3),goniopedaline(4),and stigmalactam(5),respectively.CONCLUSION:Compound 1 is a new aristolactam alkaloid,while compounds 2-5 are reported from this genus for the first time.