(R)-5-((S)-3-Benzenesulfonyl-2-methyl-propyl)-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester

((3aS,4R,7aR)-2-Hydroxy-3a,4-dimethyl-octahydro-benzofuran-4-yl)-acetaldehyde