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3-{4-[6-(3-{6-[4-(2-carboxy-ethyl)-phenylazo]-5-hydroxy-7-sulfo-naphthalen-2-yl}-ureido)-1-hydroxy-3-sulfo-naphthalen-2-ylazo]-phenyl}-propionic acid[ No CAS ]
(E)-3-{4-[6-(3-{6-[4-((E)-2-Carboxy-vinyl)-phenylazo]-5-hydroxy-7-sulfo-naphthalen-2-yl}-ureido)-1-hydroxy-3-sulfo-naphthalen-2-ylazo]-phenyl}-acrylic acid[ No CAS ]
2-{4-[6-(3-{6-[4-(1,2-dicarboxy-ethyl)-phenylazo]-5-hydroxy-7-sulfo-naphthalen-2-yl}-ureido)-1-hydroxy-3-sulfo-naphthalen-2-ylazo]-phenyl}-succinic acid[ No CAS ]