Synonyms: Antipyraldehyde(6CI,7CI,8CI); 1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazole-4-carboxaldehyde;2,3-Dimethyl-4-formyl-1-phenyl-5-pyrazolone;2,3-Dimethyl-5-oxo-1-phenyl-3-pyrazoline-4-carboxaldehyde;4-Antipyrinecarboxaldehyde; 4-Formyl-2,3-dimethyl-1-phenyl-3-pyrazolin-5-one;4-Formyl-2,3-dimethyl-1-phenyl-3-pyrazoline-5-one; 4-Formylantipyrine; NSC60408