5-乙氧基-1-(4-硝基苯基)磺酰基-吡咯烷-2-酮

1-(4-nitrophenyl)sulfonyl-5-propan-2-yloxypyrrolidin-2-one

N-(4-methylphenyl)-4-nitrobenzenesulfonamide

1-Boc-4-氨基哌啶-4-甲酸甲酯

N-叔丁基-4-硝基苯磺酰胺