Synonyms:
nitrosoantipyrine ; 4-nitrosoantipyrine ; 1,5-dimethyl-4-nitroso-2-phenylpyrazol-3-one ; 1,5-dimethyl-4-nitroso-2-phenyl-pyrazol-3-one ; 2,3-dimethyl-4-nitroso-1-phenyl-3-pyrazolin-5-one ; 1,2-dihydro-1,5-dimethyl-4-nitroso-2-phenyl-3h-pyrazol-3-one ; 1,2-dihydro-1,5-dimethyl-4-nitroso-2-phenyl-3h-pyrazole-3-one
