(3S,4R,5R)-3,4-Dihydroxy-1-(4-methoxy-benzyl)-5-[3-(tetrahydro-pyran-2-yloxy)-propyl]-pyrrolidin-2-one

{(1R,2R,3R,4S)-2,3,4-Tris-benzyloxy-1-[3-(tert-butyl-dimethyl-silanyloxy)-propyl]-hex-5-enyl}-carbamic acid tert-butyl ester

(3S,4R,5R)-5-(3-Benzyloxy-propyl)-1-(4-methoxy-benzyl)-3,4-bis-triisopropylsilanyloxy-pyrrolidin-2-one

(3S,4R,5R)-1-(4-Methoxy-benzyl)-5-[3-(tetrahydro-pyran-2-yloxy)-propyl]-3,4-bis-triisopropylsilanyloxy-pyrrolidin-2-one

(2R,3R,4S)-3,4-Bis-benzyloxy-2-[3-(tert-butyl-dimethyl-silanyloxy)-propyl]-5-oxo-pyrrolidine-1-carboxylic acid tert-butyl ester