ethyl 4-[[4-[[2-(acetoxy)ethoxy]carbonyl]phenyl]azo]-4,5-dihydro-5-oxo-1-phenyl-1H-pyrazole-3-carboxylate

4-[4-[2-(Acetyloxy)ethoxycarbonyl]phenylazo]-4,5-dihydro-5-oxo-1-phenyl-1H-pyrazole-3-carboxylic acid ethyl ester