156712-35-5 4H-Carbazol-4-one, 1,2,3,9-tetrahydro-9-methyl-3-((5-methyl-1H-imidazol-4-yl)methyl)-, monohydrochloride, (R)- Galdansetron hydrochloride Galdansetron hydrochloride [USAN]