3-(p-Nitroanilino)-1-(2,4,6-trichlorphenyl)-5-pyrazolon, 5-(4-nitro-anilino)-2-(2,4,6-trichloro-phenyl)-1,2-dihydro-pyrazol-3-one, 3-(p-nitroanilino)-1-(2,4,6-trichlorophenyl)-2-pyrazolin-5-one, 5-[(4-nitrophenyl)amino]-2-(2,4,6-trichlorophenyl)-2,4-dihydro-3h-pyrazol-3-one, 1-(2,4,6-Trichlorophenyl)-3-p-nitroanilino-2-pyrazolin-5-one, EINECS 251-935-8, 1-(2,4,6-Trichlorophenyl)-3-(4-nitroanilino)-2-pyrazolin-5-one, 3-(4-Nitroanilino)-1-(2,4,6-trichlorophenyl)-2-pyrazoline-5-one, 3-(4-Nitroanilino)-1-(2,4,6-trichlorophenyl)-5-pyrazolone, 3-(4-nitroanilino)-1-(2,4,6-trichlorophenyl)-2-pyrazolin-5-one