7-(phenylthio)-1,2,3,5,8,8a-hexahydro-5-indolizinone

6-(3-choloropropyl)-4-(phenylthio)-1,2,5,6-tetrahydro-2-pyridinone

2-(3'-chloropropyl)cyclopentanone

2-(3-Methoxycarbonyl-propyl)-pyrrolidine-1-carboxylic acid benzyl ester

1-(2-benzenesulfonyl-2-diazoacetyl)pyrrolidin-2-one