CAS 21381-61-3 appears in our catalog under these names: 4-(4,5-Dihydroimidazol-2-yl)-pyridine, 95%, 4-(4,5-Dihydro-1H-imidazol-2-yl)pyridine, 97%, 4-(4,5-Dihydroimidazol-2-yl)-pyridine. Offered by: Combi-blocks, AmBeed, Biosynth. Available pack sizes: 250mg, 1g, 5g, 0,5g.