Prostacyclin (PGI2) is a cyclooxygenase metabolite with antithrombotic properties found in vascular endothelial cells. The half-life is short both in vivo and in vitro, ranging from 30 seconds to a few minutes. CG 4305 is a stable carbacyclic analog of PGI2 that inhibits ADP-induced platelet aggregation 25% at a concentration of 50 nM. Doses of 10 mg/kg (oral) or 1 mg/kg (intraduodenal) have been shown to prevent rabbit carotid artery thrombosis.
Mabuterol, (S)- is a D isoform of Mabuterol, which is a selective β2 adrenoreceptor agonist. Mabuterol has been found to decrease the blood pressure in rats and increase heart rate and contractile force in guinea pigs. Mabuterol inhibited the positive inotropic effect of isoprenaline but has no effect on alpha-adrenergic, acetylcholine and histamine receptors.