2,5-Pyrrolidinedione, 1-(2-((4-((2,6-dichloro-4-nitrophenyl)azo)-3-methylphenyl)ethylamino)ethyl)- 2,6-Dichloro-4-nitro-2'-methyl-4'-(N-ethyl-N-(2''-succinimidoethyl)amino)azobenzene 63133-77-7