8-(5-Benzoylamino-2-sodiosulfophenylazo)-1-(2-chloroanilino)-9-hydroxy-2-pentyl-1H-naphth[1,2-d]imidazole-7-sulfonic acid sodium salt

8-[5-Benzoylamino-2-(sodiosulfo)phenylazo]-1-(o-chloroanilino)-9-hydroxy-2-pentyl-1H-naphth[1,2-d]imidazole-7-sulfonic acid sodium salt

disodium 8-[[5-(benzoylamino)-2-sulphonatophenyl]azo]-1-[(2-chlorophenyl)amino]-9-hydroxy-2-pentyl-1H-naphth[1,2-d]imidazole-7-sulphonate