diethyl 2-methyl-2-(1-methyl-3-oxocyclohexyl)propanedioate

2-benzoyl-3-methylcyclohex-2-en-1-one

3-tert-butyl-3-methylcyclohexan-1-one

6-庚炔-2-酮

1,3-二甲基-1,3-环己二烯