DIAMINODIPHENYLDYGLYCOLLICACID

3,3-di(carboxymethoxy)benzidine

4,4'-DIAMINODIPHENYL-3,3'-DIGLYCOLIC ACID

O,O'-(4,4'-diaminobiphenyl-3,3'-ylene)di(glycollic acid)

2,2'-[(4,4'-Diamino[1,1'-biphenyl]-3,3'-diyl)bisoxy]diacetic acid

2-[2-amino-5-[4-amino-3-(carboxymethoxy)phenyl]-phenoxy]acetic acid