CAS 5334-56-5 appears in our catalog under these names: 1-Methyl-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one, 98%, 1–Methyl–1H–pyrazolo(3，4–d)pyrimidin–4–ol, 1-Methyl-1H-pyrazolo(3,4-d)pyrimidin-4(7H)-one, 1-Methyl-1H-pyrazolo[3,4-d]pyrimidin-4-ol 98%, 1-Methyl-1H-pyrazolo[3,4-d]pyrimidin-4-ol, 98%, 98%. Offered by: Combi-blocks, GLPBio, Biosynth, Ambeed, Chemat. Available pack sizes: 1g, 10g, 25g, 5g, 2,5g, 250mg, 100mg, 1 g.