5-甲氧基-2-吡咯烷酮

1-benzoyl-5-pentan-2-yloxypyrrolidin-2-one

1-(3,5-dimethylphenyl)sulfonyl-5-ethoxypyrrolidin-2-one

5-ethoxy-1-pyridin-2-ylsulfonylpyrrolidin-2-one

1,2'-联吡咯烷-5'-酮