{5-Benzyloxy-2-[(S)-2-(tert-butyl-dimethyl-silanyloxymethyl)-4-eth-(E)-ylidene-pyrrolidine-1-carbonyl]-4-methoxy-phenyl}-carbamic acid allyl ester

{5-Benzyloxy-2-[(S)-2-(tert-butyl-dimethyl-silanyloxymethyl)-4-oxo-pyrrolidine-1-carbonyl]-4-methoxy-phenyl}-carbamic acid allyl ester

{5-Benzyloxy-2-[(2S,4R)-2-(tert-butyl-dimethyl-silanyloxymethyl)-4-hydroxy-pyrrolidine-1-carbonyl]-4-methoxy-phenyl}-carbamic acid allyl ester

{5-Benzyloxy-2-[(S)-4-eth-(E)-ylidene-2-hydroxymethyl-pyrrolidine-1-carbonyl]-4-methoxy-phenyl}-carbamic acid allyl ester

(2S,4R)-N-(benzyloxycarbonyl)-2-t-butyldimethylsilyloxymethyl-4-hydroxypyrrolidine