Synonyms: 6H-Dibenzo[a,g]quinolizine,5,8,13,13a-tetrahydro-2,3,9,10-tetramethoxy-13-methyl-, trans-(?à)-; Berbine, 2,3,9,10-tetramethoxy-13b-methyl-, (?à)- (8CI); (?à)-Corydaline; 6H-Dibenzo[a,g]quinolizine,5,8,13,13a-tetrahydro-2,3,9,10-tetramethoxy-13-methyl-, trans-; NSC 298182