Phenolphthalein carbinol diphosphate pentasodium salt

2-Carboxyphenylbis(4-phosphonooxyphenyl)methanol pentasodium salt

pentasodium 2-[oxidobis[4-(phosphonnatooxy)phenyl]methyl]benzoate

2-[Bis[4-[di(sodiooxy)phosphinyloxy]phenyl]hydroxymethyl]benzoic acid sodium salt

2-[Hydroxybis[4-[bis(sodiooxy)phosphinyloxy]phenyl]methyl]benzoic acid sodium salt