(3aS,5S,8R,9aS,10S,13aR,13bS)-10-((benzyloxy)methoxy)-5-((tert-butyldimethylsilyl)oxy)-6,9a,14,14-tetramethyl-8-((triethylsilyl)oxy)-4,5,8,9,9a,10,11,12,13a,13b-decahydro-13H-3a,7-methanobenzo[3,4]cyclodeca[1,2-d][1,3]dioxole-2,13-dione