5-methyl-2-(3-nitrophenyl)-2,4-dihydropyrazol-3-one, 5-Methoxy-2-(3-nitrophenyl)-2H-pyrazol-3(4H)-one, 5-methyl-2-(3-nitrophenyl)-2,4-dihydro-3-pyrazolone, 5-methyl-2-(3-nitro-phenyl)-1,2-dihydro-pyrazol-3-one, 3-methyl-1-(3-nitrophenyl)-3-pyrazolin-5-one, 1-(3-nitro-phenyl)-3-methyl-1H-pyrazol-5(4H)-one, 2,4-dihydro-5-methyl-2-(3-nitrophenyl)-3H-pyrazol-3-one, 5-methyl-2-(3-nitrophenyl)-4H-pyrazol-3-one, 1-(3'-NITROPHENYL)-3-METHYL-5-PYRAZOLONE