treprostinil pulmonary arterial hypertension drug molecule. synthetic analog of prostacyclin (pgi2

treprostinil vasodilator vasodilatation pulmonary arterial hypertension prostacyclin pgi2 lung blood pressure platelet aggregation hydrogen carbon oxygen disease drug therapy medicine medicinal product pharmacology pharmacy pharmaceutical pharma treatment generic molecule atoms chemical chemistry composition atomic model molecular compound bond structure formula circle ring line drawing skeletal