6-(1,3-dicyclopropylpropan-2-yl)-4-hydroxypyran-2-one

3-cyclohex-2-en-1-yl-4-hydroxy-6-methylpyran-2-one

6-乙基-4-羟基-2H-吡喃-2-酮

4,7-二甲基吡喃并[5,6-c]吡喃-2,5-二酮

4-羟基-6-丙基吡喃-2-酮