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Chemical structures of the major alkaloids (1-13) isolated from Cissampelos capensis. dicentrine (1), glaziovine (2), lauroscholtzine (3), pronuciferine (4), bulbocapnine (5), salutaridine (6), cycleanine (7), cissacapine (8), crotsparine (9), insularine (10), 12-O-methylcurine (11), reticuline (12), insulanoline (13).
