Any hydroxyflavone carrying four hydroxy substituents.
| Member | Definition | Role |
|---|
| 3-methylquercetin | A monomethoxyflavone that is quercetin in which the hydroxy group at position 3' is replaced by a methoxy group. | isorhamnetin |
| avicularin | A quercetin O-glycoside in which an alpha-L-arabinofuranosyl residue is attached at position 3 of quercetin via a glycosidic linkage. It is isolated particularly from Juglans regia and Foeniculum vulgare. | avicularin |
| axillarin | A dimethoxyflavone that is the 3,6-dimethyl ether derivative of quercetagetin. | axillarin |
| azaleatin | A monomethoxyflavone that is quercetin in which the hydroxy group at position 5 is replaced by a methoxy group. | azaleatin |
| cudraflavone c | A tetrahydroxyflavone that is flavone substituted by hydroxy groups at positions 5, 7, 2' and 4' and prenyl groups at positions 3 and 6. Isolated from Morus nigra, it exhibits antibacterial and cytotoxic activities. | cudraflavone C |
| datiscetin | A tetrahydroxyflavone that is 7-hydroxyflavonol bearing two additional hydroxy substituents at positions 2' and 5. | datiscetin |
| fisetin | A 7-hydroxyflavonol with additional hydroxy groups at positions 3, 3' and 4'. | fisetin |
| homoorientin | A flavone C-glycoside consisting of luteolin having a beta-D-glucosyl residue at the 6-position. | isoorientin |
| hyperoside | A quercetin O-glycoside that is quercetin with a beta-D-galactosyl residue attached at position 3. Isolated from Artemisia capillaris, it exhibits hepatoprotective activity. | quercetin 3-O-beta-D-galactopyranoside |
| isoscutellarein | A tetrahydroxyflavone that is apigenin with an extra hydroxy group at position 8. | isoscutellarein |
| kaempferol | A tetrahydroxyflavone in which the four hydroxy groups are located at positions 3, 5, 7 and 4'. Acting as an antioxidant by reducing oxidative stress, it is currently under consideration as a possible cancer treatment. | kaempferol |
| kuwanon g | A tetrahydroxyflavone isolated from the root barks of Morus alba and has been shown to exhibit anti-inflammatory activity. | kuwanone G |
| kuwanon h | A tetrahydroxyflavone isolated from the plant species of the genus Morus. | kuwanone H |
| luteolin | A tetrahydroxyflavone in which the four hydroxy groups are located at positions 3', 4', 5 and 7. It is thought to play an important role in the human body as an antioxidant, a free radical scavenger, an anti-inflammatory agent and an immune system modulator as well as being active against several cancers. | luteolin |
| maysin | A flavone C-glycoside that is luteolin attached to a disaccharide residue at position 6. It has been isolated from natural product Petrorhagia velutina and Zea mays and exhibits insecticidal and neuroprotective activities. | maysin |
| orientin | A C-glycosyl compound that is luteolin substituted by a beta-D-glucopyranosyl moiety at position 8. | orientin |
| pedalitin | A tetrahydroxy-monohydroxy-flavone, with the four hydroxy groups at C-3',-4',-5 and 6, and the methoxy group at C-7. It has been isolated from a number of plant species, including Eremosparton songoricum, Rabdosia japonica and Ruellia tuberosa. | pedalitin |
| quercetin 3-o-gentiobioside | A quercetin O-glycoside in which the hydroxy hydrogen at position 3 of quercetin has been replaced by a gentiobiosyl group. | quercetin 3-beta-gentiobioside |
| quercetin 3-o-glucopyranoside | A quercetin O-glucoside that is quercetin with a beta-D-glucosyl residue attached at position 3. Isolated from Lepisorus contortus, it exhibits antineoplastic activityand has been found to decrease the rate of polymerization and sickling of red blood cells | quercetin 3-O-beta-D-glucopyranoside |
| quercetin 3-o-methyl ether | A tetrahydroxyflavone having the 4-hydroxy groups located at the 3'- 4'- 5- and 7-positions as well as a methoxy group at the 2-position. | 3',4',5,7-tetrahydroxy-3-methoxyflavone |
| quercetin 3-sambubioside | A quercetin O-glucoside that is quercetin attached to a beta-D-sambubiosyl residue at position 3 via a glycosidc linkage. | 2)-beta-D-glucoside].html>quercetin 3-O-[beta-D-xylosyl-(1->2)-beta-D-glucoside] |
| quercetin 7-rhamnoside | A quercetin O-glycoside that is quercetin attached to a alpha-L-rhamnopyranosyl moiety at position 7 via a glycosidic linkage. | quercetin 7-O-alpha-L-rhamnopyranoside |
| quercetin-3-o-sophoroside | A quercetin O-glucoside that is quercetin attached to a beta-D-sophorosyl residue at position 3 via a glycosidic linkage. | 2)-beta-D-glucoside.html>quercetin 3-O-beta-D-glucosyl-(1->2)-beta-D-glucoside |
| quercimeritrin | A quercetin O-glucoside in which a glucosyl residue is attached at position 7 of quercetin via a beta-glycosidic linkage. | quercetin 7-O-beta-D-glucoside |
| quercitrin | A quercetin O-glycoside that is quercetin substituted by a alpha-L-rhamnosyl moiety at position 3 via a glycosidic linkage. | quercitrin |
| rhamnetin | A monomethoxyflavone that is quercetin methylated at position 7. | rhamnetin |
| rutin | A rutinoside that is quercetin with the hydroxy group at position C-3 substituted with glucose and rhamnose sugar groups. | rutin |
| scutellarein | Flavone substituted with hydroxy groups at C-4', -5, -6 and -7. | scutellarein |
| spiraeoside | A quercetin O-glucoside that is quercetin with a beta-D-glucosyl residue attached at position 4'. | quercetin 4'-O-beta-D-glucopyranoside |
| syringetin | A dimethoxyflavone that is myricetin in which the hydroxy groups at positions 3' and 5' have been replaced by methoxy groups. | syringetin |
| tamarixetin | A monomethoxyflavone that is quercetin methylated at position O-4'. Isolated from Cyperus teneriffae. | tamarixetin |