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