6,6-dimethyl-2-(4-methylphenoxy)-5,7-dihydrocyclopenta[e][1,3]oxazin-4-one

2-(dimethylamino)-6,6-dimethyl-5,7-dihydrocyclopenta[e][1,3]oxazin-4-one

5,5-dimethyl-2-piperidin-2-ylidenecyclohexane-1,3-dione

2-(indole-1-carbonyl)-4,4-dimethylcyclopentan-1-one