Similar names: 1,2-Dihydro-1,5-dimethyl-4-(methylamino)-2-phenyl-3H-pyrazol-3-one; Antipyrine, 4-(methylamino)- (6CI,8CI); 4-(Methylamino)antipyrine; 4-Methylaminophenazone; 4-Monomethylaminoantipyrine; 4-Monomethylaminophenazone; Methylaminoantipyrine; Methylaminophenazone; Monomethylaminoantipyrine; N-Methyl-4-aminoantipyrine; N-Methyl-4-aminophenazone; N-Methylaminoantipyrine; N-Methylaminophenazone; Noramidopyrine; Noraminopyrine; Metamizole Sodium Monohydrate Imp. C (EP)