SEARCH Articles Figures Tables 2-carboxyphenyl 4-methylphenyl 2-carboxyphenyl ethyl 2-carboxyphenyl phenyl Bis[2-carboxyphenyl Butyl 2-carboxyphenyl Carboxyphenyl)-6-hydroxy-2,4,5,7-tetraiodo-3-isoxanthone Carboxyphenyl)propionic Acid Tetra-carboxyphenyl porphyrin