other alpha 2-adrenergic agonists , oxymetazoline and guanfacine , also strongly inhibited carbachol-stimulated synthesis of [ 14c ] catecholamines . alpha 1-adrenergic agonists , phenylephrine and norfenefrine , did not affect the synthesis .
C1373110
alpha 2-adrenergic agonists
C0079466
guanfacine