catecholamines stimulated adenylate cyclase activity in the following order of potency : ( - ) -isoprenaline greater than ( - ) -adrenaline = ( - ) -noradrenaline greater than phenylephrine , indicating that , in human right atrium , beta 1-adrenoceptors predominate .
C0014563
adrenaline
C0028351
noradrenaline