CAS 899718-22-0 appears in our catalog under these names: 4-([(1-Acetyl-2,3-dihydro-1h-indol-5-yl)sulfonyl]amino)butanoic acid, 95%, 4-(1-Acetylindoline-5-sulfonamido)butanoic acid, 97%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 250mg, 5g, 1g.