"Ondansetron, (+,-)-Isomer"@en . . . "D017294" . . . . . "C0061851" . "4H-Carbazol-4-one, 1,2,3,9-tetrahydro-9-methyl-3-((2-methyl-1H-imidazol-1-yl)methyl)-"@en . "Ondansetron"@en . "Ondansetron"@en . .