2-[5-(tert-Butyl-dimethyl-silanyloxy)-2-methyl-cyclopent-1-enylmethoxy]-cyclohex-1-enecarbonitrile

(R)-1-[(1R,3R)-3-(tert-Butyl-dimethyl-silanyloxy)-1-methyl-2-methylene-cyclopentyl]-2-oxo-cyclohexanecarbonitrile