epicatechin (l-epicatechin) chocolate flavonoid molecule

epicatechin epicatechine phenol antioxidant flavanol flavonoid catechu mimosa catechinic acid cianidanol cyanidanol cacao bean kakaool lepicatechin herbal remedy chinese medicine tea longevity caenorhabditis atherosclerosis aging chocolate hydrogen carbon oxygen molecule atoms atomic model molecular compound composition chemical chemistry bond structure formula circle ring line drawing skeletal