28103-49-3 4-(4-Butyl-2,5-dioxo-3-methyl-3-phenyl-1-pyrrolidinyl)benzenesulfonamide BRN 1557401 Benzenesulfonamide, 4-(4-butyl-2,5-dioxo-3-methyl-3-phenyl-1-pyrrolidinyl)- PB 225