(2S,3R)-3-phenyl-5-oxo-pyrrolidine-2-carboxylic acid

2-Oxazolidinone, 3-[(2E)-1-oxo-3-phenyl-2-propenyl]-4-phenyl-, (4R)-

(2S)-2-(4-methyl-2,6,7-trioxa-bicyclo[2.2.2]oct-1-yl)-5-oxo-2,5-dihydro-pyrrole-1-carboxylic acid benzyl ester

(2S)-1-benzyloxycarbonyl-5-oxo-pyrrolidine-2-carboxylic acid 2-(3-methyl-oxetan-3-yl-methyl) ester

(2S)-5-oxo-pyrrolidine-2-carboxylic acid 3-methyl-oxetan-3-ylmethyl ester

(2S)-2-(4-methyl-2,6,7-trioxa-bicyclo[2.2.2]oct-1-yl)-5-oxo-pyrrolidine-1-carboxylic acid benzyl ester