CAS 1227465-58-8 appears in our catalog under these names: 5-Methyl-2-oxo-2,3-dihydro-1,3-benzoxazole-6-sulfonyl chloride, 95%, 5-Methyl-2-oxo-2,3-dihydrobenzo(d)oxazole-6-sulfonyl chloride, 95+%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 250mg, 1g, 5g.