(S)-5-benzyloxymetyl-1-tert-butoxycarbonyl-2-pyrrolidinone

(S)-2-Benzyloxymethyl-5-[4-(tert-butyl-diphenyl-silanyloxy)-butyl]-3,4-dihydro-2H-pyrrole

(2S,5S)-2-Allyl-5-benzyloxymethyl-2-[4-(tert-butyl-diphenyl-silanyloxy)-butyl]-pyrrolidine

(2S,5S)-2-Allyl-5-benzyloxymethyl-2-[4-(toluene-4-sulfonyloxy)-butyl]-pyrrolidine-1-carboxylic acid tert-butyl ester