dibenzyl ((3aR,3a'R,4R,4'R,5R,5'R,7aR,7a'R)-((((1R,2S)-cyclohexane-1,2-diyl)bis(oxy))bis(propane-3,1-diyl))bis(4-((tert-butyldimethylsilyl)oxy)-2,2-dimethyl-3a,4,5,7a-tetrahydrobenzo[d][1,3]dioxole-7,5-diyl))dicarbamate