(4S,4aR,8S,12aR)-4-(tert-Butyl-diphenyl-silanyloxy)-8-methyl-decahydro-7-oxa-benzocyclodecene-1,6-dione

rel-(1R,4S,4aR,5S,8R,8aS)-1,4,4a,5,8,8a-hexahydro-1,4-methanonaphthalene-5,8-diol