1,1'-(2,6-Pyridylidenedimethylene)bis(3-methylurea) 16578-11-3 2,6-Bis((1'-methylureylene-3')methyl)pyridine 5-22-11-00280 (Beilstein Handbook Reference) BRN 0422417 Urea, 1,1'-(2,6-pyridylidenedimethylene)bis(3-methyl-