1,2,3,4-Tetrahydrocarbazol-4-one;4-Oxo-1,2,3,4-tetrahydrocarbazole;1,2,3,9-Tetrahydro-4(H)-Carbazol-4-One;1,2,3,4-Tetrahydro-4-oxocarbazole;1,2,3,4-TETRAHYDRO-4-OXO-CARBAZOLE;1,2,3,9-Tetrahydro-4;2,3-Dihydro-1H-carbazol-4(9H)-one;1,2,3,4-TETRAHYDRO-9-METHYLCARBAZOL-4-ONE;1,2,3,9-Tetrahydro-4H-carbazol-4-one;1.2.3 .9-TETRAHYDRO-4H-CARBAZOLE-4-ONE;1,2,3,4-Tetrahydro-4-oxo-carbazole;RARECHEM AK MA K053;Ondansetron Impurity I;Ondansetron HCl IMpurity-I;1,2-Dihydro-4(3H)-carbazolone;2,3-Dihydrocarbazol-4(1H)-one;1,2,3,4-Terahydro-4-Oxocarbazole;1,2,3,4-Tetrahydro-4-oxocarbazol;4-OXO-1,2,3,4-TETRAHYDROCARBAZOLE;1,2-Dihydro-9H-carbazol-4(3H)-one