ethyl (4S,5R)-[4-benzyloxy-1-(4-methoxybenzyl)-2-oxopyrrolidin-5-yl]acetate

(1R,5R)-6-(4-methoxybenzyl)-2-oxa-6-azabicyclo[3.3.0]octan-3-one

((2R,3S)-1-Benzyl-3-hydroxy-pyrrolidin-2-yl)-acetic acid ethyl ester

(3aR,6R,6aR)-5-Benzyl-6-benzyloxymethyl-2,2-dimethyl-tetrahydro-[1,3]dioxolo[4,5-c]pyrrol-4-one

(2R,3S)-N-benzyl-3-hydroxy-2-hydroxymethylpyrrolidine