4,5-dichloro-1-(3,4-dihydro-2H-pyrrol-5-yl)-2,3-dihydropyrrole

1-三甲基硅基吡咯酮

4-硝基丁烷酸

methyl 3-(2-oxopyrrolidin-1-yl)prop-2-enoate

1-(2-azidobenzoyl)pyrrolidin-2-one