1,5-dimethyl-4-nitroso-2-phenyl-1H-pyrazol-3(2H)-one;1-Phenyl-2,3-dimethyl-4-nitroso-5-pyrazolone; 2,3-Dimethyl-4-nitroso-1-phenyl-5-pyrazolone; 4-Nitrosoantipyrin; 4-Nitrosoantipyrine; NSC163932; NSC75060;1,2-Dihydro-1,5-dimethyl-4-nitroso-2-phenyl-3H-pyrazol-3-one
