Any hydroxyflavone in which is the ring hydrogen at position 3 of the heterocyclic ring is replaced by a hydroxy group.
| Member | Definition | Role |
|---|
| 3-hydroxyflavone | A monohydroxyflavone that is the 3-hydroxy derivative of flavone. | flavonol |
| eupatin | A trimethoxyflavone that is quercetagetin methylated at positions 4', 6 and 7. | eupatin |
| icariin | A member of the class of flavonols that is kaempferol which is substituted at position 8 by a 3-methylbut-2-en-1-yl group and in which the hydroxy groups at positions 3, 4', and 7 have been converted to the corresponding 6-deoxy-alpha-L-mannopyranoside, methyl ether, and beta-D-glucopyranoside, respectively. A phoshphodiesterase-5 inhibitor, it is obtained from several species of plants in the genus Epimedium and is thought to be the main active ingredient of the Chinese herbal medicine Herba Epimedii (yinyanghuo). | icariin |
| 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 |
| kaempferol 3-O-beta-L-glucopyranoside | A kaempferol O-glucoside that is kaempferol attached to a beta-L-glucopyranosyl moiety at position 3 via a glycosidic linkage. | kaempferol 3-O-beta-L-glucopyranoside |
| kaempferol 7-o-glucoside | A kaempferol O-glucoside that is kaempferol attached to a beta-D-glucopyranosyl moiety at position 7 via a glycosidic linkage. | kaempferol 7-O-beta-D-glucopyranoside |
| kaempferol-7-methyl ether | A monomethoxyflavone that is the 7-methyl ether derivative of kaempferol. | rhamnocitrin |
| ombuine | A dimethoxyflavone that is quercetin in which the hydroxy groups at positions 7 and 4' are replaced by methoxy groups. Isolated from Cyperus teneriffae, it exhibits anti-inflammatory activity. | ombuin |
| papyriflavonol a | A pentahydroxyflavone that is flavone substituted with hydroxy groups at positions 3, 5, 7, 3' and 4' and prenyl groups at positions 6 and 5'. Isolated from Broussonetia papyrifera, it exhibits inhibitory activity against phospholipase A2 and tyrosinase. | papyriflavonol A |
| patuletin | A trimethoxyflavone that is quercetagetin methylated at position 6. | patuletin |
| quercetagetin | A hexahydroxyflavone that is flavone substituted by hydroxy groups at positions 3, 5, 6, 7, 3' and 4' respectively. | quercetagetin |
| quercetin 5,7,3',4'-tetramethyl ether | A tetramethoxyflavone that is the 5,7,3',4'-tetramethy-derivative of quercetin. | quercetin 5,7,3',4'-tetramethyl ether |
| 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 |
| 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 |
| spiraeoside | A quercetin O-glucoside that is quercetin with a beta-D-glucosyl residue attached at position 4'. | quercetin 4'-O-beta-D-glucopyranoside |