(1S,2R,3S,5R)-2-(O-tert-butyldimethylsilyloxymethylen)-6,6-dimethyl-3-[(1R,2R)-2-methoxy-1-ethoxy-2-phenyl-3-pentyn-1-sulfanyl]bicyclo[3.1.1]heptane

(1S,2R,3S,5R)-2-(O-tert-butyldimethylsilyloxymethylen)-6,6-dimethyl-3-[(1S,2S)-2-methoxy-1-ethoxy-2-phenyl-3-pentyn-1-sulfanyl]bicyclo[3.1.1]heptane