(1R,8R,10R,11R)-10-(tert-Butyl-dimethyl-silanyloxy)-11-(4-methoxy-benzyloxy)-1-methyl-4,7-dioxa-tricyclo[6.2.1.02,6]undec-2(6)-en-5-ol

((1R,3R,5R,7R,8R)-7-((tert-butyldimethylsilyl)oxy)-8-((4-methoxybenzyl)oxy)-1,2',2'-trimethyl-4-oxaspiro[bicyclo[3.2.1]octane-2,4'-[1,3]dioxolan]-3-yl)methanol

(1R,3S,5S,6S,8R)-3-(tert-Butyl-diphenyl-silanyloxymethyl)-8-(4-methoxy-benzyloxy)-5-methyl-4-methylene-2-oxa-bicyclo[3.2.1]octan-6-ol