the analogues were substituted in the 2-position of the purine ring , or in the exocyclic amino group , or were modified in the imidazole or sugar rings.2 the effects of these compounds on coronary blood flow , peripheral blood pressure , and heart rate were compared with those of adenosine.3 9-beta-d-arabinofuranosyladenine had no cardiovascular action ;
C0001443
adenosine
C0042646
arabinofuranosyladenine