• CAS:1782955-76-3

• CAS:3023970-24-0

• CAS:2230685-53-5

• CAS:1610059-51-2

• CAS:1656990-56-5

• CAS:2055880-12-9

• CAS:

  2,2'-((2,5-di(pyridin-4-yl)-1,4-phenylene)bis(oxy))diacetic acid

• CAS:

  5,5'-(1,4-phenylene)dinicotinic acid

• CAS:1250321-91-5

  Benzoic acid, 4,4'-[4,4'-bipyridine]-2,6-diylbis-

• CAS:1214356-55-4

  4'-carboxy-4,2':6',4''-terpyridine