Similar names: Antipyrine, 4-amino- (8CI); 4-Amino-1,2-dihydro-1,5-dimethyl-2-phenyl-3H-pyrazol-3-one; (2,3-Dihydro-1,5-dimethyl-3-oxo-2-phenyl-1H-pyrazol-4-yl)amine; 1,2-Dihydro-1,5-dimethyl-2-phenyl-4-amino-3H-pyrazol-3-one; 1-Phenyl-2,3-dimethyl-4-amino-5-pyrazolone; 4-AAP; 4-Amino-1,2-dihydro-2,3-dimethyl-1-phenylpyrazol-5-one; 4-Amino-1,5-dimethyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one; 4-Amino-1,5-dimethyl-2-phenyl-1,2-dihydropyrazol-3-one; 4-Amino-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one; 4-Amino-1,5-dimethyl-2-phenyl-1H-pyrazol-3-one; 4-Amino-1,5-dimethyl-2-phenyl-3-pyrazolone; 4-Amino-1,5-dimethyl-2-phenyl-4-pyrazolin-3-one; 4-Amino-1,5-dimethyl-2-phenylpyrazolin-3-one; 4-Amino-1,5-dimethyl-3-oxo-2-phenylpyrazoline; 4-Amino-1-phenyl-2,3-dimethyl-5-pyrazolone; 4-Amino-2,3-dimethyl-1-phenyl-3-pyrazolin-5-one; 4-Amino-2,3-dimethyl-1-phenyl-5-pyrazolone; 4-Amino-2,3-dimethyl-1-phenylpyrazolin-5-one; 4-Aminoantipyrine; 4-Aminophenazone; Aminoantipyrine; Aminoazophene; Ampyrone; Metapirazone; NSC 60242; Solvapyrin A