(1S,2R,3S,4S,5R)-5-({[(2S,3R,4S,5S)-2-{4-chloro-3-[(4-ethoxyphenyl)methyl]phenyl}-3,4,5-trihydroxy-6,6-bis(hydroxymethyl)-3,4,5,6-tetrahydro-2H-pyran-2-yl]oxy}methyl)-1-{4-chloro-3-[(4-ethoxyphenyl)methyl]phenyl}-7,8-dioxabicyclo[3.2.1]octane-2,3,4-triol