1,7,7-trimethyl-3-methylenebicyclo[2.2.1]heptan-2-one InChI=1/C11H16O/c1-7-8-5-6-11(4,9(7)12)10(8,2)3/h8H,1,5-6H2,2-4H bicyclo[2.2.1]heptan-2-one, 1,7,7-trimethyl-3-methylene-