epinephrine , norepinephrine and methoxamine produced maximal effects , whereas clonidine behaved as partial agonist and b-ht 933 ( 2-amino-6-ethyl-4,5,7,8-tetrahydro-6h-oxazole- [ 5,4-d ] azepin dihydrochloride ) was almost without activity in the two experimental models used .
C0014563
epinephrine
C0028351
norepinephrine