1539-39-5 22164-96-1 4,4'-(Iminodimethylene)dipyridine citrate 4-Pyridinemethanamine, N-(4-pyridinylmethyl)-, 2-hydroxy-1,2,3-propanetricarboxylate (1:1) Bicordin Bis(4-pyridylmethyl)amine citrate CCB Pyridine, 4,4'-(iminodimethylene)di-, citrate (1:1)