吡喃是六元杂环，非芳香环，由五个碳原子和一个氧原子组成，并含有两个双键。分子式为C5H6O，吡喃有两个异构体，其位置与双键的位置不同。在2H吡喃中，饱和碳处于位置2，而在4H-吡喃中，饱和碳位于位置4。
(S)-6,7-Difluorochroman-4-amine
(S)-6-isopropylchroman-4-amine hcl
(S)-6-(trifluoromethyl)chroman-4-amine
2-Ethyl-2-methyl-3,4-dihydro-2H-1-benzopyran-4-amine
(S)-6-(Trifluoromethyl)chroman-4-amine hydrochloride
(R)-Chroman-3-amine hydrochloride
Chroman-3-amine hydrochloride
(R)-Chroman-2-ylmethanamine hydrochloride
Chroman-2-ylmethanamine hydrochloride
Chroman-2-ylmethanamine
3-Hydroxy-2-(4-methoxyphenyl)-4H-chromen-4-one
2-(3,4-Dihydroxyphenyl)-3,7-dihydroxy-4H-chromen-4-one hydrate(1:x)
3,5-Dihydroxy-2-(4-hydroxyphenyl)-7-methoxy-4H-chromen-4-one
3-Hydroxy-2-(3-methoxyphenyl)-4H-chromen-4-one
3,6-Dihydroxy-2-phenyl-4H-chromen-4-one
2-(3,4-Dimethoxyphenyl)-3-hydroxy-4H-chromen-4-one
3,5-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)-7-methoxy-4H-chromen-4-one
3,7-Dihydroxy-2-(3,4,5-trihydroxyphenyl)-4H-chromen-4-one
7,8-Dihydroxy-6-methoxy-2H-chromen-2-one
4-(Chloromethyl)-7-hydroxy-2H-chromen-2-one
2-(3,4-Dimethoxyphenyl)-3-hydroxy-5,7-dimethoxy-4H-chromen-4-one
2-(3,4-Dihydroxyphenyl)-5,7-dimethoxy-4H-chromen-4-one
2-(3,4-Dimethoxyphenyl)-5,7,8-trimethoxy-4H-chromen-4-one
2-(3,4-Dihydroxyphenyl)-3,7-dihydroxy-5-methoxy-4H-chromen-4-one
5,7-Dimethoxy-2H-chromen-2-one
4-(Bromomethyl)-7-methoxy-2H-chromen-2-one
6,7-Dimethoxy-2H-chromen-2-one
6-Hydroxy-7-methoxy-2H-chromen-2-one
4-(Hydroxymethyl)-7-methoxy-2H-chromen-2-one
8-Bromochroman-4-one
