CAS 1421637-53-7 appears in our catalog under these names: 5–Aminoisothiazole–4–carboxamide, 5-Aminoisothiazole-4-carboxamide 97%, 5-Aminoisothiazole-4-carboxamide, 97%, 97%, 5-AMINOISOTHIAZOLE-4-CARBOXAMIDE, 97%. Offered by: GLPBio, Ambeed, Chemat, Fluorochem. Available pack sizes: 100mg, 250mg, 1g.