Synonyms: 4H-Carbazol-4-one,1,2,3,9-tetrahydro-9-methyl-3-[(5-methyl-1H-imidazol-4-yl)methyl]-,monohydrochloride, (3R)- (9CI); 4H-Carbazol-4-one,1,2,3,9-tetrahydro-9-methyl-3-[(5-methyl-1H-imidazol-4-yl)methyl]-,monohydrochloride, (R)-; GR 81225C; Galdansetron hydrochloride