CAS 2503-56-2 appears in our catalog under these names: Trapidil EP Impurity A, 7–Hydroxy–5–methyl(1,2,4)triazolo(1,5–a)pyrimidine, 7-Hydroxy-5-methyl[1,2,4]triazolo[1,5-a]pyrimidine, 98% , 7-Hydroxy-5-methyl-[1,2,4]triazolo[1,5-a]pyrimidine, 5-Methyl[1,2,4]triazolo[1,5-a]pyrimidin-7-ol, 97% . Offered by: Mikromol, GLPBio, Thermo Scientific (Alfa Aesar), TCI, Thermo Scientific. Available pack sizes: 25mg, 100mg, 100g, 25g, 500g, 1000g, 5g, 10g.