3d image of flavan skeletal formula

flavan flavonoid flavonol flavone isoflavone benzopyran derivative flavan-3-ols flavan-4-ols leucoanthocyanidin cocoa liquor casuarina glauca actinorhizal plant frankia heterocycle luteoliflavan herbal phytochemical phytotherapy herb natural herbalism pharmacognosy pharmacopoeia metabolite metabolism biosynthesis mechanism biosynthetic intermediate biogenesis substrate precursor synthesis bioprecursor metabolic endogenous molecule molecular formula skeletal structural structure biochemistry biomolecule bioactive biochemical 3d