the agonist potency order and the ec50 value for each agonist are brl 37344 ( 0.5 nm ) greater than isoproterenol ( 1.5 nm ) greater than norepinephrine ( 3 nm ) greater than epinephrine ( 7 nm ) greater than salbutamol ( 15 nm ) .
C0028351
norepinephrine
C0014563
epinephrine