ed50 values and dissociation constants for norepinephrine ( ne ) , epinephrine ( epi ) , isoproterenol ( iso ) , methoxamine ( met ) and clonidine ( clo ) were determined by analysis of dose-response data with and without partial inactivation of alpha receptors by phenoxybenzamine .
C0028351
norepinephrine
C0014563
epinephrine