(2S,3S)-2-Amino-3-fluoro-succinic acid diethyl ester

diethyl (3S)-2-azido-3-hydroxysuccinate

(2R,3R)-3-[(S)-3-Methyl-1-(3-methyl-butylcarbamoyl)-butylcarbamoyl]-aziridine-2-carboxylic acid ethyl ester

N-((2S,3S)-3-trans-ethoxycarbonyloxiran-2-carbonyl)-D-phenylalanine benzyl ester

(2R,3R)-aziridine-2,3-dicarboxylic acid monoethyl ester