LOOC ArOH kinh É! LOOH ArOC 2fi propagation (kp [LH]). The best-known example of a phenolic antioxidant is α-tocopherol (α-TOH, 2), the most potent form of vitamin E, nature's primary defense against radical chain oxidation.[1] Recently, considerable effort has been devoted to the development of peroxyl-radical-trapping antioxidants more effective than α- TOH,[2–5] since the peroxidation of lipids in vivo has been suggested to be a major factor ...