CAS 23000-43-3 appears in our catalog under these names: 4-Chloro-1-methyl-1h-pyrazolo[3,4-d]pyrimidine, 98%, 4–Chloro–1–methylpyrazolo(3，4–d)pyrimidine, 4-Chloro-1-methyl-1H-pyrazolo[3,4-d]pyrimidine 95%, 4-Chloro-1-methyl-1H-pyrazolo[3,4-d]pyrimidine, 95%, 95%, 4-Chloro-1-methyl-1H-pyrazolo[3,4-d]pyrimidine, 96%. Offered by: Combi-blocks, GLPBio, Ambeed, Chemat, Fluorochem. Available pack sizes: 1g, 25g, 100g, 5g, 10g, 100mg, 250mg.