4-[1-(tert-butyl-dimethyl-silanyloxy)-2-methyl-propyl]-2-trichloro-methyl-4,5-dihydro-oxazole

(R)-2-(tert-Butyl-dimethyl-silanyloxymethyl)-2-[(S)-1-(tert-butyl-dimethyl-silanyloxy)-2-methyl-propyl]-4-methyl-2H-pyrrole

(3S,7aR)-7a-[(S)-1-(tert-Butyl-dimethyl-silanyloxy)-2-methyl-propyl]-6-methyl-3-phenyl-1,7a-dihydro-pyrrolo[1,2-c]oxazol-5-one

(R)-4-((S)-1-Hydroxy-2-methyl-propyl)-oxazolidin-2-one