Separation of Alkaloids from the Roots of Macleaya Cordata / 中国药师

Objective:To study the alkaloids in Macleaya cordata. Methods:The compounds were isolated and purified by silica gel,recrystallization,and semi-preparative HPLC, and their strcuctures were confirmed by MS and NMR. Results: Nine alkaloids were obtained and identified as dihydrochelerythrine(1), 6-cyanodihydrosanguinarine(2), R-6-((R)-1-hydroxyethyl)dihydrochel-erythrine(3),8-demethyl-dihydrochelerythrine(4),cheilanthifoline(5),canadine(6),8-demethyl-chelerythrine(7),protopine(8) and allocryptopine(9). Conclusion:Compounds 4-6 are isolated from the genus of Macleaya for the first time.