in the aorta , the order of agonist potency was norepinephrine greater than phenylephrine greater than epinephrine greater than methoxamine greater than alpha-methylnorepinephrine and that of antagonist potency was prazosin greater than wb-4101 greater than phentolamine greater than dihydroergotamine greater than phenoxybenzamine greater than yohimbine .
C0028351
norepinephrine
C0025805
alpha-methylnorepinephrine