1,7,7-trimethyl-3-(1-methylethylidene)bicyclo[2.2.1]heptan-2-one InChI=1/C13H20O/c1-8(2)10-9-6-7-13(5,11(10)14)12(9,3)4/h9H,6-7H2,1-5H bicyclo[2.2.1]heptan-2-one, 1,7,7-trimethyl-3-(1-methylethylidene)-