(1S,2S,3S,4R,5S)-1-{5-[(1S,2R,3S,4S,5S)-1-{4-chloro-3-[(4-ethoxy-3-fluorophenyl)methyl]phenyl}-2,3,4-trihydroxy-7,8-dioxabicyclo[3.2.1]octan-5-yl]-2,4-dioxapent-1-yl}-5-{4-chloro-3-[(4-ethoxy-3-fluorophenyl)methyl]phenyl}-6,8-dioxabicyclo[3.2.1]octane-2,3,4-triol