trisodium N-[5-hydroxy-6-[[5-[[2-(sulphonatooxy)ethyl]sulphonyl]-2-methoxyphenyl]azo]-7-sulphonato-2-naphthyl]succinamate

N-[5-Hydroxy-6-[[5-[[2-[(sodiooxysulfonyl)oxy]ethyl]sulfonyl]-2-methoxyphenyl]azo]-7-(sodiooxysulfonyl)-2-naphtyl]succinamidic acid sodium salt