(3S,4R,5R)-3,4-Bis-benzyloxy-5-(3-hydroxy-propyl)-pyrrolidin-2-one

(3S,4R,5R)-3,4-Bis-benzyloxy-5-(3-hydroxy-propyl)-1-(4-methoxy-benzyl)-pyrrolidin-2-one

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

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

(3S,4R,5R)-3,4-Bis-benzyloxy-5-[3-(tert-butyl-dimethyl-silanyloxy)-propyl]-pyrrolidin-2-one