Bicyclo CompoundsBicyclo Compounds, HeterocyclicOctanesImidesCyclizationIndole AlkaloidsMolecular StructureCycloaddition ReactionStereoisomerismAdenosine A3 Receptor AgonistsAdenosine A3 Receptor AntagonistsPrenylationMethyl n-Butyl KetoneNorbornanesRhodiumCyclooctanesAnti-Anxiety AgentsReceptor, Adenosine A3KetonesNucleosidesCyclopropanesHexanesMagnetic Resonance SpectroscopySpectrophotometry, InfraredBornanesMolecular ConformationStructure-Activity RelationshipCatalysisModels, MolecularSulfur Compounds