(R)-3,4-epoxybutyric acid

(R)-N-(tert-butoxycarbonyl)-4-[(methoxycarbonyl)methyl]-2-oxooxazolidine

(4R)-4-hydroxy-1-((1S)-1-phenylethyl)pyrrolidin-2-one

[(5R)-2-oxo-1,3-oxazolidin-5-yl]acetic acid

(R)-3-Acetoxy-4-isocyanato-butyric acid ethyl ester