PHENOLPHTHALEIN COMPLEXONE PHENOLPHTHALEXON 3,3'-BIS[N,N-DI(CARBOXYMETHYL)AMINOMETHYL]PHENOLPHTHALEIN 3,3'-BIS[N,N-BIS(CARBOXYMETHYL)AMINOMETHYL]PHENOLPHTHALEIN N,N’-[[3-oxo-1(3H)-isobenzofuranylidene]bis(6-hydroxy-3,1-phenylene)methylene]bis(N-carboxymethyl)Glycine Phenolphthalexone N,N'-[(3-oxo-1(3H)-isobenzofuranylidene)bis[(6-hydroxy-3,1-phenylene)methylene]]bis[N-(carboxymethyl)glycine N,N'-[[3-oxo-1(3H)-isobenzofuranylidene]bis(6-hydroxy-3,1-phenylene)methylene]bis(N-carboxymethyl)Glycine