4-Acetaminoantipyrine, Acetamidoantipyrine, 4-Acetamidoantipyrine, N-(1,5-dimethyl-3-oxo-2-phenylpyrazol-4-yl)acetamide, Antipyrine,4-acetamido, 4-acetylamino-1,5-dimethyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one, 4-Acetoaminoantipyrine, Acetylaminoantipyrine, N-Acetylaminoantipyrine, Acetamide, N-(2,3-dihydro-1,5-dimethyl-3-oxo-2-phenyl-1H-pyrazol-4-yl)-, Acetamide,N-antipyrinyl, N-Acetyl-4-aminoantipyrine, 4-acetamido-2,3-dimethyl-1-phenylpyrazol-5-one, 4-Acetylaminophenazone