effects of some vasodilating ( oxyfedrine , dipyridamole , verapamil and nifedipine ) and antihypertensive ( propranolol , hydralazine , prazosin and dihydralazine ) drugs on the human blood platelet biosynthesis of prostaglandins from labelled arachidonic acid have been examined in vitro .
C0020223
hydralazine
C0012271
dihydralazine