36090-33-2 4-(4-Ethyl-4-methyl-2-oxo-1-pyrrolidinyl)benzenesulfonamide 5-21-06-00512 (Beilstein Handbook Reference) BRN 1479611 Benzenesulfonamide, 4-(4-ethyl-4-methyl-2-oxo-1-pyrrolidinyl)- PB 45