the ec50 values for l-epinephrine , l-norepinephrine and alpha-methylnorepinephrine were respectively 1.9 +/- 0.7 microm , 2.3 +/- 1.6 microm and 5.1 +/- 1.8 microm .
C0014563
epinephrine
C0028351
l-norepinephrine