3H-1,2,4-Triazol-3-one, 2,4-dihydro-5-methyl-4-phenyl-
Δ2-1,2,4-Triazolin-5-one, 3-methyl-4-phenyl-
2,4-Dihydro-5-methyl-4-phenyl-3H-1,2,4-triazol-3-one
3-Methyl-4-phenyl-1H-1,2,4-triazol-5-one
3-Methyl-4-phenyl-1H-1,2,4-triazol-5(4H)-one
3-Methyl-4-phenyl-4,5-dihydro-1H-1,2,4-triazol-5-one