the competitive inhibition studies show that the apparent kd values for ( - ) -epinephrine , ( - ) -norepinephrine , and prazosin were increased 15 , 13 , and 25 times , respectively , with no significant change in the apparent kd values for yohimbine or phentolamine 2 hr postendotoxin .
C0014563
epinephrine
C0028351
norepinephrine