4-[(4-Chloro-phenyl)-hydrazono]-2-[2-(2,4-dinitro-phenyl)-acetyl]-5-methyl-2,4-dihydro-pyrazol-3-one

2-[2-(2,4-Dinitro-phenyl)-acetyl]-5-methyl-4-[(4-nitro-phenyl)-hydrazono]-2,4-dihydro-pyrazol-3-one