3d image of prephytoene diphosphate skeletal formula

prephytoene diphosphate carotenoid precursor pyrophosphate tetraterpenoid organic pigment 3d xanthophylls carotenes tetraterpenes supplement biological activity bioactive nutrient food additive nutraceutica dietary vitamin antioxidant anti-cancer anti-aging healthy aging alternative medicine herbal herbal phytochemical phytotherapy plant herb natural herbalism pharmacognosy pharmacopoeia metabolite metabolism biosynthesis cycle mechanism biosynthetic intermediate biogenesis substrate synthesis derivative bioprecursor metabolic enzyme endogenous