Flavonols, including: Quercetin, Rutin, Quercitrin, Kaempferol, Myricetin, Karanjin, Pinobanksin, Troxerutin, Monoxerutin, Gossypetin, Icariin, ... Morin (molecule), Natsudaidain, Pachypodol

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More info: Backbone of a flavanol, substituent numbers are indicated. Flavonols (with an "o") are a class of flavonoids that have the 3-hydroxyflavone backbone (IUPAC name : 3-hydroxy-2-phenylchromen-4-one). Their diversity stems from the different positions the phenolic -OH groups. They are distinct from flavanols (with an "a", like catechin), another class of flavonoids.