(1R,3aS,7aR)-1-(tert-Butyl-dimethyl-silanyloxy)-7a-methyl-4-methylene-octahydro-inden-5-one

Toluene-4-sulfonic acid (1R,3aS,4S,5R,7aR)-1-(tert-butyl-dimethyl-silanyloxy)-5-hydroxy-7a-methyl-4-(2-trimethylsilanyl-ethoxymethoxy)-octahydro-inden-4-ylmethyl ester