5-ethoxy-1-(3-phenylphenyl)sulfonylpyrrolidin-2-one

1-(2,6-dimethylphenyl)sulfonyl-5-ethoxypyrrolidin-2-one

5-ethoxy-1-(4-methylphenyl)sulfonylpyrrolidin-2-one

5-ethoxy-1-(4-hydroxyphenyl)sulfonylpyrrolidin-2-one

5-乙氧基-1-(4-硝基苯基)磺酰基-吡咯烷-2-酮