Butanoic acid, 4-[[4-[2-[2-methoxy-5-methyl-4-[2-(4-methyl-2-nitrophenyl)diazenyl]phenyl]diazenyl]phenyl]methylamino]-, 2,5-dioxo-1-pyrrolidinyl ester
Butanoic acid, 4-[[4-[2-[2-methoxy-5-methyl-4-[2-(4-methyl-2-nitrophenyl)diazenyl]phenyl]diazenyl]phenyl]methylamino]-, 2,5-dioxo-1-pyrrolidinyl ester