3d image of epsilon tocopherol skeletal formula

epsilon tocopherol vitamin herbal phytochemical phytotherapy plant herb natural herbalism pharmacognosy pharmacopoeia antioxidant fat-soluble tocotrienol food additive adjuvants ingredient agent ins number food alzheimer's disease vascular dementia cancer cataracts metabolite metabolism biosynthesis mechanism biosynthetic intermediate biogenesis substrate precursor synthesis derivative bioprecursor metabolic endogenous molecule molecular formula skeletal structural structure 3d