Acetic acid (2R,3R,4S,5S,6R)-4,5-diacetoxy-6-acetoxymethyl-2-((2R,3R,4R,5S,6R)-3-azido-5-hydroxy-6-hydroxymethyl-2-phenylsulfanyl-tetrahydro-pyran-4-yloxy)-tetrahydro-pyran-3-yl ester