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

ethyl 2-((3aR,6aR)-2-oxohexahydro-4H-furo[3,2-b]pyrrol-4-yl)acetate

N-benzyl Geissman-Waiss lactone

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

(4S,5R)-1-Benzyl-4-hydroxy-5-hydroxymethyl-pyrrolidin-2-one