the rank order of aggregatory potency ( pd2 values ) was r ( - ) -epinephrine ( 6.3 ) greater than r ( - ) -ne ( 5.9 ) greater than ( +/- ) -erythro-cobefrin ( 5.3 ) greater than s ( + ) -epinephrine ( 4.7 ) = s ( + ) -ne ( 4.7 ) = clonidine ( 4.7 ) = dopamine ( 4.6 ) greater than epinine ( 4.4 ) greater than s ( + ) -alpha-methyldopamine ( 4.3 ) = r ( - ) -alpha-methyldopamine ( 4.3 ) greater than ( +/- ) -threo-cobefrin ( 3.7 ) .
C0014563
epinephrine
C0028351
ne