4 two groups of agonists could be distinguished : one group consisting of adrenaline , noradrenaline and the b1-selective agonist prenalterol ( h133/22 ) with a high enzyme discharge potency and a second group consisting of the beta 2-agonists , terbutaline and salbutamol , with a markedly lower effect .
C0014563
adrenaline
C0028351
noradrenaline