4,4-dimethylcyclopent-2-en-1-ol

5-carbamoyl-6,6-dimethyl-2,4-dioxo-3-azabicyclo[3.1.0]hexane-1-carboxylic acid

9,9-二甲基-3,7-二氮杂双环[3.3.1]壬烷-2,4,6,8-四酮

6,6-dimethyl-2,4-dioxo-3-azabicyclo[3.1.0]hexane-1,5-dicarboxylic acid

3,3-二甲基戊烷-1,5-二醇