3d image of normetanephrine skeletal formula

normetanephrine metabolite norepinephrine catechol-o-methyl transferase catecholamine-secreting tumor pheochromocytom degradation rendering marker metabolism biosynthesis cycle mechanism pathway path catabolism biosynthetic intermediate biogenesis substrate precursor synthesis derivative bioprecursor metabolic enzyme endogenous contractor human metabolome database hmdb hormone hormonal therapy replacement function action endocrine endocrinology level prohormone analogue bioactive cell biochemistry biology biomolecule