Bicyclo CompoundsBicyclo Compounds, HeterocyclicOctanesImidesCyclizationMolecular StructureIndole AlkaloidsStereoisomerismCycloaddition ReactionAdenosine A3 Receptor AgonistsAdenosine A3 Receptor AntagonistsPrenylationMethyl n-Butyl KetoneNorbornanesRhodiumAnti-Anxiety AgentsCyclooctanesKetonesMagnetic Resonance SpectroscopyReceptor, Adenosine A3Structure-Activity RelationshipNucleosidesCyclopropanesSpectrophotometry, InfraredHexanesMolecular ConformationBornanesSulfur CompoundsVolatile Organic CompoundsCatalysisModels, MolecularPlant ExtractsDrug Evaluation, PreclinicalPhenolsHeterocyclic CompoundsInhibitory Concentration 50Biphenyl CompoundsSulfhydryl CompoundsSmall Molecule LibrariesOrganotin CompoundsAniline CompoundsSpiro CompoundsNitrogen CompoundsChromatography, High Pressure LiquidDrug DesignDose-Response Relationship, DrugNitroso Compounds