(2S,3aS,5S,9aS,10S,13aR,13bS)-5-((tert-butyldimethylsilyl)oxy)-10-((2-methoxypropan-2-yl)oxy)-6,9a,14,14-tetramethyl-9-oxo-2-phenyl-5,8,9,9a,10,11,13a,13b-octahydro-4H-3a,7-methanobenzo[3,4]cyclodeca[1,2-d][1,3]dioxol-13-yl trifluoromethanesulfonate