3d image of cholane skeletal formula

cholane triterpene stereoisomer rana catesbeiana american bullfrog sterols steroids bile acids 3d herbalism plant phytotherapy path synthesis biogenesis herbal metabolic contractor antioxidant metabolite healthy aging substrate dietary anti-cancer natural phytoalexin alternative medicine food additive intermediate nutrient catabolism pathway endogenous flavonoid cycle pharmacopoeia bioprecursor nutraceutica precursor derivative traditional chinese alkaloid vitamin phytochemical prescription drug pharmacognosy metabolism biosynthetic