6-[(2E)-4,5,6,7-tetrafluoro-3-methyl-2-[(2E,4E)-4-(phenylimino)but-2-enylidene]-3-(4-sulfobutyl)-2,3-dihydro-1H-indol-1-yl]hexanoic acid
6-[(2E)-4,5,6,7-tetrafluoro-3-methyl-2-[(2E,4E,6E)-6-(phenylimino)hexa-2,4-dienylidene]-3-(4-sulfobutyl)-2,3-dihydro-1H-indol-1-yl]hexanoic acid
4-[2-{(1E,3E)-4-[acetyl(phenyl)amino]buta-1,3-dienyl}-1-(5-carboxypentyl)-4,5,6,7-tetrafluoro-3-methyl-3H-indolium-3-yl]butane-1-sulfonate