IUPAC:5-amino-3-(2-{4'-[2-(8-amino-1-hydroxy-3,6-disulfonaphthalen-2-yl)diazen-1-yl]-3,3'-dimethyl-[1,1'-biphenyl]-4-yl}diazen-1-yl)-4-hydroxynaphthalene-2,7-disulfonic acid sodium
IUPAC:5-amino-3-(2-{4'-[2-(8-amino-1-hydroxy-3,6-disulfonaphthalen-2-yl)diazen-1-yl]-3,3'-dimethyl-[1,1'-biphenyl]-4-yl}diazen-1-yl)-4-hydroxynaphthalene-2,7-disulfonic acid sodium