Dipyridamole
Dipyridamole is a pyrimidopyrimidine that is 2,2',2'',2'''-(pyrimido[5,4-d]pyrimidine-2,6-diyldinitrilo)tetraethanol substituted by piperidin-1-yl groups at positions 4 and 8 respectively. A vasodilator agent, it inhibits the formation of blood clots. It has a role as an adenosine phosphodiesterase inhibitor, an EC 3.5.4.4 (adenosine deaminase) inhibitor, a platelet aggregation inhibitor and a vasodilator agent. It is a member of piperidines, a pyrimidopyrimidine, a tertiary amino compound and a tetrol.