2,2-dimethyl-3H-furan

2,5-dihydro-2,2-dimethylfuran

5-乙基-2,2-二甲基-5H-1,3-噻唑

2-乙基-1,3-氢化茚二酮

5,5,8-trimethylnona-3,7-dien-2-one