2-ChloroadenosineNucleosidesAdenosineReceptors, PurinergicAdenosine-5'-(N-ethylcarboxamide)Purine NucleosidesPyrimidine NucleosidesReceptors, Purinergic P1XanthinesPhenylisopropyladenosinePurinergic P1 Receptor AntagonistsPurinergic P1 Receptor AgonistsTheophyllineNucleoside Transport ProteinsTubercidinArabinonucleosides8-Bromo Cyclic Adenosine MonophosphateAntiviral AgentsReverse Transcriptase InhibitorsZidovudineAdeninePhenethylaminesEquilibrative Nucleoside Transporter 1DioxolanesZalcitabineAdenosine KinaseDeoxycytidine KinaseReceptor, Adenosine A2BDipyridamoleDideoxynucleosidesAdenosine DeaminaseDideoxynucleotidesPurinesCytidineKineticsGuanosineHIV Reverse TranscriptasePyran CopolymerPurinergic AntagonistsCladribineAnti-HIV AgentsDeoxyribonucleosidesCyclic AMPRibonucleosidesStavudineUridineThymine NucleotidesThioinosineArabinofuranosyluracilAcyclovirAdenosine TriphosphateLamivudineThymidine KinaseInosineStructure-Activity RelationshipOrganophosphonatesReceptor, Adenosine A2ANucleotidesDose-Response Relationship, DrugDidanosinePurine-Nucleoside PhosphorylaseMolecular StructureGuinea PigsDeoxyuridineDeoxycytidineDeoxyadenosinesMuscarineDrug Resistance, ViralCells, CulturedThymidineCytosineGanciclovirGuanineCell Line2-AminopurineAdenylate CyclaseHIV-1Nucleoside-Diphosphate KinaseEquilibrative-Nucleoside Transporter 2Substrate SpecificityAntimetabolites, AntineoplasticCytarabine