CAS 723299-79-4 is the registry number for 2-(2,5-Dioxo-2,5-dihydro-1h-pyrrol-1-yl)-5,6,7,8-tetrahydro-4h-cyclohepta[b]thiophene-3-carbonitrile, 95%. Offered by: Combi-blocks, Ambeed, BLDpharm, Chemat, Fluorochem. Available pack sizes: 1g, 5g, 25mg, 50mg, 100mg, 250mg.