4-(2,5-Dioxo-1-pyrrolidinyl)benzenesulfonamide 4-21-00-04565 (Beilstein Handbook Reference) 5470-06-4 BRN 0262526 Benzenesulfonamide, 4-(2,5-dioxo-1-pyrrolidinyl)- EINECS 226-797-7 PB 22 p-(2,5-Dioxo-1-pyrrolidinyl)benzenesulphonamide