4-((1-Amino-3,6-disulfo-7-((p-sulfophenyl)azo)-8-hydroxy-2-naphthyl)azo)-4'-((p-hydroxyphenyl)azo)-3,3'- dimethoxybiphenyl, trisodium salt

1-Amino-2-[4'-(4-hydroxyphenylazo)-3,3'-dimethoxy-1,1'-biphenyl-4-ylazo]-8-hydroxy-7-(4-sodiosulfophenylazo)-3,6-naphthalenedisulfonic acid disodium salt

trisodium 4-amino-5-hydroxy-3-[[4'-[(4-hydroxyphenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-6-[(4-sulphonatophenyl)azo]naphthalene-2,7-disulphonate