a higher concentration of epinephrine ( 1.4 x 10 ( -8 ) m ) decreased norepinephrine overflow in both shr and wky , and this change ( at 15 hz stimulation ) was antagonized by yohimbine ( 1.0 x 10 ( -7 ) m ) .
C0014563
epinephrine
C0028351
norepinephrine