(4S,5S,2R,3R,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)-2H-3,4,5,6-tetrahydropyran-2-yl (2E,4E)-5-((7S,1R,9R)-7-hydroxy-4,9-dimethyl-11-oxa-12-oxotricyclo[6.4.2.0<1,7