9-[[[4-[(2,5-Dioxo-1-pyrrolidinyl)oxy]-4-oxobutyl][(4-methylphenyl)sulfonyl]amino]carbonyl]-10-(3-sulfopropyl)-acridinium inner salt

for the following products 3-[9-(((3-(N-Succinimidyloxycarboxypropyl)[4-methxylphenyl]sulfonyl)amine)carboxyl]-10-acridiniumyl)-1-propanesulfonate inner salt | Nsp-sa-nhs and 9-[[[4-[(2,5-Dioxo-1-pyrrolidinyl)oxy]-4-oxobutyl][(4-methylphenyl)sulfonyl]amino]carbonyl]-10-(3-sulfopropyl)-acridinium inner salt