1,2-Dihydro-2-methyl-5-phenyl-3H-1,2,4-triazol-3-one 2-Methyl-5-phenyl-2,4-dihydro-3H-1,2,4-triazol-3-one 3H-1,2,4-Triazol-3-one, 1,2-dihydro-2-methyl-5-phenyl- 54034-38-7