(2R,3S)-3-Azido-4-(tert-butyl-diphenyl-silanyloxy)-1-(4-methoxy-benzyloxy)-butan-2-ol

(4S,5R)-4-(tert-Butyl-diphenyl-silanyloxymethyl)-5-(4-methoxy-benzyloxymethyl)-2,2-dimethyl-oxazolidine-3-carboxylic acid 2,2,2-trichloro-ethyl ester