oyster metamorphosis can be induced by vertebrate adrenergic agonists with relative potencies : cirazoline greater than epinephrine greater than phenylephrine greater than or equal to norepinephrine greater than alpha-methylnorepinephrine greater than isoproterenol much greater than methoxamine = clonidine .
C0028351
norepinephrine
C0025805
alpha-methylnorepinephrine