4,6,6-trimethylbicyclo[3.1.1]hept-3-en-2-one InChI=1/C10H14O/c1-6-4-9(11)8-5-7(6)10(8,2)3/h4,7-8H,5H2,1-3H bicyclo[3.1.1]hept-3-en-2-one, 4,6,6-trimethyl-