5,5-二甲基-1,3-环己二酮

3,3-二甲基戊二酸二乙酯

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

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