Wiktionary
metanephrines
n. (plural of metanephrine English)
Wikipedia
Metanephrines
The metanephrines group of molecules consist of metanephrine and normetanephrine.
An article in the Journal of the American Medical Association, 2002, indicated that the measurement of plasma free levels of metanephrines is the best tool in the diagnosis of pheochromocytoma, an adrenal medullary neoplasm.