Aristolochic acids and aristolactams from Aristolochia auricularia

Abstract

A methanolic extract of the roots of Aristolochia auricularia was found to contain seven known compounds, aristolochic acids I, II, III and IV and aristolactams I, II and III. In addition, four novel compounds, the methyl ester of 3-hydroxy-4-methoxyaristolochic acid II, 9-methoxyaristolactam I, 9-methoxyaristolactam II and 9-methoxyaristolactam IV were isolated and identified