[(R)-1-Hydroxymethyl-3-((2S,3S,4R,5R,6R)-3,4,5-tris-benzyloxy-6-benzyloxymethyl-tetrahydro-pyran-2-yl)-propyl]-carbamic acid tert-butyl ester

(4S)-S-(2',6'-anhydro-3',4',5',7'-tetra-O-benzyl-1'-deoxy-D-glycero-D-gulo-heptitol-1'-yl)-N-(tert-butoxycarbonyl)-2,2-dimethyl-4-(thiomethyl)-1,3-oxazolidine