CAS 51953-18-5 appears in our catalog under these names: 4–Pyrimidinol, Pyrimidin-4-ol 97%, Pyrimidin-4-ol, 98%, 98%, Pyrimidin-4-ol, 97%, 3,4-dihydropyrimidin-4-one, 98%. Offered by: GLPBio, Ambeed, Chemat, Fluorochem. Available pack sizes: 100g, 25g, 1g, 5g, 10g, 500g, 50g, 250g.