3d image of guibourtinidin skeletal formula

guibourtinidin tannin leucoguibourtinidin proguibourtinidin guibourtinidin chloride trihydroxyflavylium anthocyanidin pigment flavylium cation tannoid astringent polyphenolic biomolecules precipitate protein 3d supplement biological activity bioactive nutrient prescription drug food additive nutraceutica dietary vitamin antioxidant anti-cancer anti-aging healthy aging alternative medicine tcm traditional chinese herbal herbal phytochemical phytotherapy plant herb natural herbalism pharmacognosy pharmacopoeia parasympathomimetic alkaloid flavonoid phytoalexin phytoestrogen biochemistry biology biomolecule