CAS 773877-44-4 appears in our catalog under these names: 1,3-Dimethyl-2,4-dioxo-1,2,3,4-tetrahydroquinazoline-6-sulfonyl chloride, 95%, 1,3-Dimethyl-2,4-dioxo-1,2,3,4-tetrahydroquinazoline-6-sulfonyl chloride, 95+%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 250mg, 1g, 10g, 5g.