maximal stimulation by 100 microm-dopamine resulted in a 5 -- 10-fold increase in adenylate cyclase activity with half-maximal stimulation occurring at a concentration of 1 microm . l-noradrenaline and l-adrenaline were some 10 times less potent than dopamine whilst the alpha- and beta-adrenoreceptor agonists , l-phenylephrine and dl-isoprenaline were inactive .
C0028351
noradrenaline
C0014563
adrenaline