urinary excretion rates of the major norepinephrine metabolites , 3-methoxy-4-hydroxymandelic acid , 3-methoxy-4-hydroxy-phenylglycol and normetanephrine , were determined in 12 normal subjects and 23 patients with neurogenic orthostatic hypotension due to either multiple system atrophy [ shy-drager dyndrome ( msa ) ] or idiopathic orthostatic hypotension ( ioh ) .
C0028351
norepinephrine
C0028385
normetanephrine