CAS 1428139-20-1 appears in our catalog under these names: (7-Methyl-4-oxo-3,4,5,6,7,8-hexahydropyrido[3,4-d]pyrimidin-2-yl)cyanamide, 95%, (7-MEthyl-4-oxo-3,4,5,6,7,8-hexahydropyrido(3,4-d)pyrimidin-2-yl)cyanamide, 95%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 250mg, 1g, 5g.