Figure 4. Structure of flavanone, flavone, and flavonol compounds examined
in this survey
|
| Common name
|
Structural name
|
Ring substitution
pattern
|
|
|
R1
|
R2
|
Flavanone aglycones:
|
| Naringenin
|
5,7,3'–trihydroxyflavanone
|
OH
|
H
|
| Isosakuranetin
|
5,7–dihydroxy–3'–methoxyflavanone
|
O–Me
|
H
|
| Eriodictyol
|
5,7,3',4'–tetrahydroxyflavanone
|
OH
|
OH
|
| Hesperetin
|
5,7,4'–trihydroxy–3'–methoxyflavanone
|
O–Me
|
OH
|
| 3–Hydroxyflavanone
aglycone:
|
| Dihydrokaempferol
|
3,5,7,4'–tetrahydroxyflavanone
|
OH
|
H
|
| Flavone aglycones:
|
| Apiginin
|
5,7,4'–trihydroxyflavone
|
OH
|
H
|
| Fortuneletin
|
5,7–dihydroxy–3'–methoxyflavone
|
O–Me
|
H
|
| Luteolin
|
5,7,3',4'–tetrahydroxyflavone
|
OH
|
OH
|
| Diosmetin
|
5,7,4'–trihydroxy–3'–methoxyflavone
|
O–Me
|
OH
|
| Flavonol aglycones:
|
| Kaempferol
|
3,5,7,3'–tetrahydroxyflavone
|
OH
|
H
|
| Kampferide
|
3,5,7–trihydroxy–3'–methoxyflavone
|
O–Me
|
H
|
| Quercetin
|
3,5,7,3',4'–pentahydroxyflavone
|
OH
|
OH
|
| Chrysoeriol
|
3,5,7,4'–tetrahydroxy–3'–methoxyflavone
|
O–Me
|
OH
|
| Isorhamnetin
|
3,5,7,3'–tetrahydroxy–4'–methoxyflavone
|
OH
|
O–Me
|
| Diglycoside groups:
|
| Rutinoside
|
6–O–alpha–l–rhamnosyl–beta–D–glucoside
|
| Neohesperidoside |
2–O–alpha–l–rhamnosyl–beta–D–glucoside
|
United States Department of
Agriculture
Agricultural Research
Service
The material on this page is in the public domain.
Original posting: April 1, 1999. |
|
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