low concentration of exogenous epinephrine ( 5.5 x 10 ( -9 ) m ) potentiated norepinephrine overflow during nerve stimulation in shr , and this ( at 15 hz stimulation ) was antagonized by propranolol ( 5.0 x 10 ( -7 ) m ) , whereas , the overflow in wky was reduced by the same concentration of epinephrine .
C0028351
norepinephrine
C0014563
epinephrine