4,4,5A-Trimethylperhydro-1-benzoxiren-2-one10276-21-8100 % similar 3,3,5,5-Tetramethylcyclohexanone14376-79-539 % similar Dihydro-4,4-dimethyl-2H-pyran-2,6(3H)-dione4160-82-133 % similar