7,7-dimethyl-3,4,5,6-tetrahydro-2-benzofuran-1-one

1-乙炔基-6,6-二甲基环己烯

2,2-dimethylheptanedial

6-(hydroxymethylidene)-2,2-dimethylcyclohexan-1-one

2,2-dimethylcyclohexane-1-carboxylic acid