3-methyl-1-phenyl-1H-pyrazol-5(4H)-one; 2,4-Dihydro-5-methyl-2-phenyl-3H-pyrazol-3-one; 1-Phenyl-3-methyl-1H-4,5-dihydropyrazol-5-one; Methylphenylpyrazolone; NCI-C 03952; NSC 12;NSC 26139; NSC 2629; Norantipyrine; Norphenazone; Radicut; USP Antipyrine Related Compound A; Phenazone EP Impurity A
