4,4'-Dihydroxy-3-(2-methoxyphenylazo)-3'-[6-(sodiosulfo)-2-naphtylazo][7,7'-ureylenedi(2-naphthalenesulfonic acid sodium)] salt

6-[3-[6-(2-Methoxyphenylazo)-7-sodiosulfo-5-hydroxy-2-naphtyl]ureido]-1-hydroxy[2,2'-azobisnaphthalene]-3,6'-disulfonic acid disodium salt

trisodium 7-[[[[6-[(o-anisyl)azo]-5-hydroxy-7-sulphonato-2-naphthyl]amino]carbonyl]amino]-4-hydroxy-3-[(6-sulphonato-2-naphthyl)azo]naphthalene-2-sulphonate