3-甲基-2-丁烯醛

7-cyano-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran-4-ol

4-溴-2-羟基苯乙酮

7-溴-2,2-二甲基苯并二氢吡喃-4-酮

7-cyano-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran-4-one