3,4-二甲基苯甲醛

4,4-二甲基环己酮

6,6-dimethylcyclohexa-2,4-dien-1-one

9,9-dimethyl-11-oxatricyclo[4.3.1.12,5]undeca-3,7-dien-10-one

3,3-dimethyl-6-methylidenecyclohexa-1,4-diene