(4S)-isobutyl-(5S)-((2R)-methoxycarbonyl-4-methylenecyclopentyl)-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester

(5S)-((2R)-butylcarbamoyl-cyclopentyl)-(4S)-isobutyl-2,2-dimethyloxazolidine-3-carboxylic acid tert-butyl ester