the use of complete dose-response curves , several different adrenergic compounds ( i.e. , epinephrine , norepinephrine , alpha-methylnorepinephrine , octopamine , phenylephrine , and dopamine ) , and different rat blood vessels supports the concept that adrenergic molecules containing a catecholamine nucleus and a beta-hydroxyl group elicit the most potent constrictor responses from peripheral blood vessels .
C0028351
norepinephrine
C0025805
alpha-methylnorepinephrine