4-formylamino-1,5-dimethyl-2-phenyl-1,2-dihydro-pyrazol-3-one, N-(2,3-Dihydro-1,5-dimethyl-3-oxo-2-phenyl-1H-pyrazol-4-yl)formamide, N-(2,3-dimethyl-5-oxo-1-phenyl-3-pyrazolin-4-yl)carboxamide, N-(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)formamide, 4-Formylaminoantipyrine, 1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-ylformamide, N-formyl-4-aminoantipyrine, 4-Formamidoantipyrine, Formamide,N-antipyrinyl, N-(1,5-dimethyl-3-oxo-2-phenylpyrazol-4-yl)formamide, 4-formyl-aminoantipyrin, 4-Formylaminoantipyrine (N-(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)formamide, 4-formaminoantipyrine