Table 1.
The chemical structures of 30 flavonoids.
No. | Flavonoids | Core Structure | R3 | R5 | R6 | R7 | R8 | R2′ | R3′ | R4′ | R5′ |
---|---|---|---|---|---|---|---|---|---|---|---|
1 | Flavone | ![]() |
H | H | H | H | H | H | H | H | H |
2 | Tangertin | H | OMe | OMe | OMe | OMe | H | H | OMe | H | |
3 | Wogonin | H | OH | H | OH | OMe | H | H | H | H | |
4 | Baicalein | H | OH | OH | OH | H | H | H | H | H | |
5 | Luteolin | H | OH | H | OH | H | H | OH | OH | H | |
6 | Apigenin | H | OH | H | OH | H | H | H | OH | H | |
7 | Chrysin | H | OH | H | OH | H | H | H | H | H | |
8 | Schaftoside | H | OH | Cglc | OH | Carb | H | H | OH | H | |
9 | Galangin | OH | OH | H | OH | H | H | H | H | H | |
10 | Quercetin | OH | OH | H | OH | H | H | OH | OH | H | |
11 | Morin | OH | OH | H | OH | H | OH | H | OH | H | |
12 | Kaempferol | OH | OH | H | OH | H | H | H | OH | H | |
13 | Kaempferide | OH | OH | H | OH | H | H | H | OMe | H | |
14 | Myricetin | OH | OH | H | OH | H | H | OH | OH | OH | |
15 | Isorhamnetin | OH | OH | H | OH | H | H | OMe | OH | H | |
16 | Quercitrin | Orha | OH | H | OH | H | H | OH | OH | H | |
17 | Rutin | ORG | OH | H | OH | H | H | OH | OH | H | |
18 | Hesperetin | ![]() |
H | OH | H | OH | H | H | OH | OMe | H |
19 | Naringenin | H | OH | H | OH | H | H | H | OH | H | |
20 | Naringin | H | OH | H | ONG | H | H | H | OH | H | |
21 | Liquiritigenin | H | H | H | OH | H | H | H | OH | H | |
22 | Taxifolin | OH | OH | H | OH | H | H | OH | OH | H | |
23 | Formononetin | ![]() |
- | H | OH | H | H | H | OMe | H | H |
24 | Puerarin | - | H | H | OH | Cglc | H | H | OH | H | |
25 | Glycitein | - | H | OMe | OH | H | H | H | OH | H | |
26 | Daidzein | - | H | H | OH | H | H | H | OH | H | |
27 | Genistein | - | OH | H | OH | H | H | H | OH | H | |
28 | Biochanin A | - | OH | H | OH | H | H | H | OMe | H | |
29 | Isoliquiritigenin | ![]() |
OH | OH | - | - | - | H | H | OH | H |
30 | Neohesperidin dihydrochalcone | ![]() |
NG | OH | - | - | - | H | OH | OMe | H |
Cglc: -C-glucopyranosyl; Carb: -O-(α-l-Arabinopyranosyl); Orha: -O-α-l-rhamnopyranosyl; RG: -(6-O-(6-deoxy-α-l-mannopyranosyl)-β-d-glucopyranosyloxy); NG: -(2-O-(6-deoxy-α-l-mannopyranosyl)-β-d-glucopyranosyl).