(3S,4R,5S)-5-Benzyl-3,4-bis-benzyloxy-1-(4-methoxy-benzyl)-pyrrolidin-2-one

(3S,4R,5S)-5-Benzyl-3,4-bis-benzyloxy-pyrrolidin-2-one

(2S,3R,4S)-2-Benzyl-3,4-bis-benzyloxy-5-oxo-pyrrolidine-1-carboxylic acid tert-butyl ester

(4S,5S)-tert-butyl 2,2-dimethyl-4-benzyl-5-prop-2-enyl-1,3-oxazolidine

(4S,5S)-2,2-dimethyl-3-(tert-butoxycarbonyl)-4-benzyl-5-formylmethyl-1,3-oxazolidine