3-methyl-5-[1-methyl-2-(4-methylphenylsulfonyloxy)-(1R)-ethyl]-2-oxo-(4R,5R)-1,3-oxazolan-4-ylmethylacetate

2-tert-butyldiphenylsilyloxymethyl-3-[1-methyl-2(RSS)-phenylsulfinyl-(1S)-ethyl]-(2S,3R)-oxirane

(4S,5S)-3-Methyl-5-((E)-(R)-1-methyl-pent-3-enyl)-2-oxo-oxazolidine-4-carboxylic acid

(5R)-3-methyl-5-<(1R,3E)-1-methyl-3-pentenyl>-2-oxo-4-oxazolidine-carbonitrile

ethyl (4S,5R)-3-methyl-5-((1'R,3'E)-1'-methyl-3'-pentenyl)-2-oxooxazolidine-4-carboximidate