(4S,5S)-4-methoxycarbonyl-5-(1-methylethyl)-2-phenyl-1,3-oxazolidine

(1S,7aR)-7a-(tert-Butyl-dimethyl-silanyloxymethyl)-1-isopropyl-6,6-dimethyl-dihydro-pyrrolo[1,2-c]oxazole-5,7-dione