Cialis (tadalafil) is a eclectic inhibitor of cyclic guanosine monophosphate (cGMP)-specific phosphodiesterase font 5. Tadalafil <a href="http://cialiswithoutdoctorprescription.org/">cialis without a doctors prescription</a> has the experiential pattern C22H19N3O4 representing a molecular weight of 389.41. The structural method is:
