What is "normetanephrine"

n. (context organic compound English) A metabolite of norepinephrine that is excreted in the urine and found in certain tissues.

Normetanephrine is a metabolite of norepinephrine created by action of catechol-O-methyl transferase on norepinephrine. It is excreted in the urine and found in certain tissues. It is a marker for catecholamine-secreting tumors such as pheochromocytoma.