3,3'-((3,3'-Diethoxy(1,1'-biphenyl)-4,4'-diyl)bis(azo))bis(5-(benzoylamino)-4-hydroxynaphthalene-2,7-disulphonic) acid;5-benzamido-3-[4-[4-[(8-benzamido-1-hydroxy-3,6-disulfo-2-naphthyl)azo]-3-ethoxy-phenyl]-2-ethoxy-phenyl]azo-4-hydroxy-naphthalene-2,7-disulfonic acid
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