adenosine uptake was also diminished by certain structural analogues of adenosine ( e.g. , 2-chloroadenosine ) , by several alkylxanthine drugs ( theophylline , isobutylmethylxanthine , enprofylline and 8-phenyltheophylline ) , and by certain calcium antagonists ( verapamil , nifedipine and trifluoperazine ) .
C0001443
adenosine
C0000275
2-chloroadenosine