(S)-1-((1R,3R)-3-Hydroxy-1-methyl-2-methylene-cyclopentyl)-2-oxo-cyclohexanecarbonitrile

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

rac-(3R,3aS,5aR,9aS,9bS)-3-hydroxy-9b-methyloctahydro-4H,9aH-3a,5a-epoxycyclopenta[c]chromene-9a-carbonitrile

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