disodium 4-hydroxy-3-[(4-methyl-2-sulphonatophenyl)azo]-7-[[[6-(vinylsulphonyl)bicyclo[2.2.1]hept-2-yl]carbonyl]amino]naphthalene-2-sulphonate

7-[[[6-(Ethenylsulfonyl)bicyclo[2.2.1]heptan-2-yl]carbonyl]amino]-4-hydroxy-3-[(4-methyl-2-sodiosulfophenyl)azo]-2-naphthalenesulfonic acid sodium salt