(2S,4S,5R)-4-Methyl-2-((E)-3-oxo-propenyl)-5-phenyl-oxazolidine-3-carboxylic acid benzyl ester

(2S,4S,5R)-4-Methyl-2-((E)-3-oxo-but-1-enyl)-5-phenyl-oxazolidine-3-carboxylic acid benzyl ester

(2S,4S,5R)-2-((E)-3-Hydroxy-but-1-enyl)-4-methyl-5-phenyl-oxazolidine-3-carboxylic acid benzyl ester

(2S,4S,5R)-4-Methyl-2-((S)-1-methyl-3-oxo-butyl)-5-phenyl-oxazolidine-3-carboxylic acid benzyl ester

(2S,4S,5R)-4-Methyl-2-[(S)-1-(2-oxo-ethyl)-pentyl]-5-phenyl-oxazolidine-3-carboxylic acid benzyl ester