2-(4'-((N-(beta-Cyanoethyl)-N-(beta-succinimidoethyl))amino)-2'-methylstyryl)-1,3,3-trimethylindolinum sulfate zinc sulfate double salt 64282-98-0 Zinc(4+), bis(2-(2-(4-((2-cyanoethyl)(2-(2,5-dioxo-1-pyrrolidinyl)ethyl)amino)-2-methylphenyl)ethenyl)-1,3,3-trimethyl-3H-indolium)-, sulfate (1:2)