(1R.2S.3S.4R)-2-((4aR.6S.7R.8R.8aR)-7.8-dihydroxy-2-phenylhexahydropyrano[3.2-d][1.3]dioxin-6-yloxy)-3-hydroxy-6.8-dioxabicyclo[3.2.1]octan-4-yl 4-methylbenzenesulfonate