2H-pyran-2-one, 3,6-dihydro-4,6,6-trimethyl- 4,6,6-trimethyl-3,6-dihydro-2H-pyran-2-one InChI=1/C8H12O2/c1-6-4-7(9)10-8(2,3)5-6/h5H,4H2,1-3H