5,5-dimethyl-2-(2-oxopropyl)cyclohexane-1,3-dione

5,5-二甲基-1,3-环己二酮

6,6-dimethyl-4-oxo-1-phenyl-4,5,6,7-tetrahydroindole-2-acetic acid

3-羟基-5,5-二甲基环己-2-烯-1-酮