... , derived from 2,6-bis(2-pyridyl)-4(1H)-pyridone CAS: 128143-88-4 or 4'-hydroxy-2,2':6',2''-terpyridine CAS: 101003 ... ',2"-Terpyridine CAS: 1148-79-4 2,6-Bis(2-pyridyl)-4(1H)-pyridone CAS: 128143-88-4 4'-Hydroxy-2,2':6',2''-terpyridine ... CAS: 101003-65-0 4’-Bromo-2,2 ...