28103-55-1 4-(3,4-Dimethyl-2,5-dioxo-3-phenyl-1-pyrrolidinyl)benzenesulfonamide BRN 1553796 Benzenesulfonamide, 4-(3,4-dimethyl-2,5-dioxo-3-phenyl-1-pyrrolidinyl)- PB 219