substance p , eledoisin , physalaemin , neurotensin , angiotensin , histamine and carbachol were found to contract , while noradrenaline , dopamine , bradykinin , nucleotides ( amp , adp , atp ) and prostaglandins ( pge1 , pge2 , pga2 ) induced concentration-dependent relaxations of tracheae contracted with substance p or carbachol .
C0033554
prostaglandins
C0002335
pge1