(4R)-4-(2-Carboxyethyl)-3-[(phenylmethoxy)carbonyl]oxazolidin-5-one

(R)-2-benzyloxycarbonylamino-5-hydroxypentanoic acid methyl ester

(R)-4-(3-Hydroxy-propyl)-5-oxo-oxazolidine-3-carboxylic acid benzyl ester

methyl-(2R)-2-amino-5-(tert-butyldimethylsilyloxy)pentanoate

methyl-(2R)-2-(buta-1,3-dienyl-isobutyrylamin)-5-(hydroxy)pentanoate