The molecular formula C21H20O11 (molar mass: 448.38 g/mol, exact mass: 448.100561 u) may refer to: * Astragalin, a flavonol * Cynaroside, a flavone * Kaempferol 7-O-glucoside, a flavonol * Isoorientin, a flavone * Maritimein, an aurone * Orientin, a flavone * Quercitrin, a flavonol * Rhodionin, a flavonol rhamnoside * Trifolin, a flavanol galctoside This set index page lists chemical structure articles associated with the same molecular formula.If an internal link led you here, you may wish to change the link to point directly to the intended article.