Spiro[bornane-3,1'-cyclopentan]-2-one

3,3-Tetramethylene-1,7,7-trimethylbicyclo[2.2.1]heptane-2-one

Spirobicyclo2.2.1heptane-2,1-cyclopentan-3-one, 4,7,7-trimethyl-

4,7,7-Trimethylspiro[bicyclo[2.2.1]heptane-2,1'-cyclopentan]-3-one