in 9 of 16 platelet-rich plasma preparations , r ( - ) -epinephrine , r ( - ) -ne , and ( +/- ) erythro-cobefrin were agonists and the remaining analogs blocked r ( - ) -ne-induced aggregation with a rank order of inhibitory potencies ( pkb values ) of clonidine ( 6.2 ) greater than s ( + ) -alpha-methyldopamine ( 5.0 ) greater than dopamine ( 4.6 ) = r ( - ) -alpha-methyldopamine ( 4.4 ) greater than or equal to s ( + ) -ne ( 4.3 ) greater than n-isopropyldopamine ( 4.1 ) greater than s ( + ) -isoproterenol ( 3.7 ) = r ( - ) -isoproterenol ( 3.5 ) .
C0014563
epinephrine
C0028351
ne