acetyl-5-dihydro-2,3-trimethyl-2,2,6-pyrone-4

2-乙基-4,6-二甲基吡啶

2,3,6,6-tetramethyl-5,6-dihydro-4H-pyran-4-one

反式-2-丁烯酸乙酯

3-氯苯丙酮