1 BHT N-[4-(bis{4-[(3-sulfophenyl)amino]phenyl}methylene)cyclohexa-2,5-dien-1-ylidene]-4-sulfobenzenaminium 1.000 2 KFM 4,4',4''-[methanetriyltris(4,1-phenyleneazanediyl)]tri(benzene-1-sulfonic acid) 0.733