3d image of 2 3-dihydroxy cinnamic acid skeletal formula

dihydroxy cinnamic acid chemical formula structure caffeic ester double bond coumaric isomer hydroxycinnamic benefit derivative source ferulic molecular antioxidant synthesis formula melanin structural caffeate lignin 3d rendering biochemistry science scientific research organic molecule skeletal geometry herbal phytochemicals phytotherapy plant metabolite metabolism biosynthesis cycle mechanism pathway path catabolism biosynthetic