free dopamine , representing about 1.0 % of the total catecholamine content was distributed in the same pattern as epinephrine or the sum of epinephrine and norepinephrine , revealing a significant positive correlation between regional dopamine and epinephrine plus norepinephrine ( r = 0.97 ) as well as between dopamine and epinephrine ( r = 0.96 ) .
C0007412
catecholamine
C0028351
norepinephrine