4-苯基四氢呋喃-2-酮

4,5-二氢-3-苯基-2-呋喃酮

甲基 3-氧代-2,3-二氢-1H-茚-1-羧酸

5-hydroxy-4-methyl-1,4-diphenylpyrrolidin-2-one

3',6'-dihydroxyspiro[oxolane-5,9'-xanthene]-2-one