that the sensitising actions of doca were due to inhibition of extraneuronal uptake was suggested ( 1 ) by the relative magnitudes of its sensitising effects on the three amines [ in decreasing order , epinephrine greater than isoprenaline ( beta-stimulation ) greater than norepinephrine ] and ( 2 ) by its ability to prevent the potentiation of epinephrine by normetanephrine .
C0028351
norepinephrine
C0028385
normetanephrine