3d image of columnidin skeletal formula

columnidin orange red pigment 3-deoxyanthocyanidins episcias columneas sarmientas sinningias red-flowered gesneriad columnea columnea hybrida rendering biogenesis traditional chinese medicine tcm mechanism plant herb alternative endogenous path metabolic herbalism bioprecursor dietary anti-aging catabolism anti-cancer phytotherapy metabolism alkaloid nutraceutica pathway precursor enzyme derivative pharmacognosy biosynthetic intermediate cycle flavonoid synthesis metabolite natural healthy aging herbal