5,6-二氢-4-甲基-2-苯基-2H-吡喃

6-ethyl-4,6-dimethyl-2,5-dihydropyran

6-ethyl-4,6-dimethyl-2,3-dihydropyran

2-丁基-5,6-二氢-2,4-二甲基-2H-吡喃

6-butyl-4,6-dimethyl-2,5-dihydropyran