(-)-Canadine 5096-57-1 6H-Benzo[g]-1,3-benzodioxolo[5,6-a]quinolizine, 5,8,13,13a-tetrahydro-9,10-dimethoxy-, (13aS)- AIDS-002690 AIDS002690 NSC36351 Protoberberine alkaloid Tetrahydroberberine