(3R,4R)-1-(3-(2-(methyldiphenylsilyl)-1,3-dithian-2-yl)propyl)-5-oxopyrrolidine-2,3,4-triyl triacetate

(3R,4R)-1-(3-(2-(methyldiphenylsilyl)-1,3-dithian-2-yl)propyl)-2-oxo-5-(phenylthio)pyrrolidine-3,4-diyl diacetate

(3R,4R)-1-(4-(methyldiphenylsilyl)-4-oxobutyl)-2-oxo-5-(phenylthio)pyrrolidine-3,4-diyl diacetate

1-[4-(Methyl-diphenyl-silanyl)-4-oxo-butyl]-6-phenylsulfanyl-piperidin-2-one

1-[4-(Methyl-diphenyl-silanyl)-4-oxo-butyl]-5-phenylsulfanyl-pyrrolidin-2-one