5'-deoxyadenosine , 2-chloroadenosine , and adenosine-5'-n-ethylcarboxamide , all derivatives of adenosine with pronounced vasodilatory properties , were most potent in displacing [ 3h ] -adenosine from its binding sites with ic50 values ranging from 1.8 to 14.3 mumol/l .
C0000275
2-chloroadenosine
C0001443
adenosine