(3R,4S)-3,4-bis((tert-butyldimethylsilyl)oxy)-1-((1R,2R,4R)-2-hydroxy-1,7,7-trimethylbicyclo[2.2.1]heptan-2-yl)pentan-1-one

(1R)-2-endo-[(1R,2R,4R)-bicyclo[2.2.1]hept-5-en-2-ylcarbonyl]-1,7,7-trimethylbicyclo[2.2.1]-heptan-2-ol

1,7,7-trimethylbicyclo(2.2.1)heptan-2,5-dione

5-exo-hydrocy-1,7,7-trimethylbicyclo[3.2.1]heptan-2-one