on the bullock iris sphincter , rat stomach fundus and guinea-pig trachea , ( +/- ) omega-tetranor-16-p-chlorophenoxy pge2 ( ici 80205 ) and 16,16-dimethyl pge2 were more active contractile agents than pge2 , whereas for relaxant activity on the cat trachea , guinea-pig trachea and dog hind limb arterial vessels in vivo the order of potency was reversed .
C0012472
pge2
C0033554
agents