Secondary Metabolites and Cytotoxic Activities from the Stem Bark of Zanthoxylum nitidum

A dihydrobenzo[c]phenanthridine alkaloid, epizanthocadinanine A (1), together with 27 known compounds, including eight benzo[c]phenanthridines, i.e., oxynitidine (2), oxyavicine (3), oxychelerythrine (4), dihydrochelerythrine (5), 6-acetonyldihydrochelerythrine (6), norchelerythrine (7), decarine (8), and arnottianamide (9); two 2-quinolones, i.e., flindersine (10) and 4-methoxy-1-methyl-2-quinolone (11); two furoquinolines, i.e., skimmianine...