4-Hydroxy-3-(2-methyl-4-nitrophenyl)azo-N-[2-(2-ethoxyethoxy)ethyl]-1,8-naphthalenedicarbimide

2-[2-(2-ethoxyethoxy)ethyl]-6-hydroxy-5-[(2-methyl-4-nitrophenyl)azo]-1H-benz[de]isoquinoline-1,3(2H)-dione

2-[2-(2-Ethoxyethoxy)ethyl]-6-hydroxy-5-[(2-methyl-4-nitrophenyl)azo]-1H-benzo[de]isoquinoline-1,3(2H)-dione