2,4-Dihydro-2-[2-methoxy-5-[[2-(1-oxopropoxy)ethyl]sulfonyl]phenyl]-5-methyl-4-[(2-nitrophenyl)azo]-3H-pyrazol-3-one

2,4-dihydro-2-[2-methoxy-5-[[2-(propionyloxy)ethyl]sulphonyl]phenyl]-5-methyl-4-[(2-nitrophenyl)azo]-3H-pyrazol-3-one