Heterocyclic CompoundsBicyclo CompoundsHeterocyclic Compounds, Bridged-RingCyclizationNitrogen CompoundsHeterocyclic Compounds, 2-RingBicyclo Compounds, HeterocyclicPalladiumOctanesMolecular StructureHeterocyclic Compounds with 4 or More RingsHeterocyclic Compounds, 3-RingMagnetic Resonance SpectroscopyHeterocyclic Compounds, 1-RingImidesIndole AlkaloidsStereoisomerismCycloaddition ReactionAdenosine A3 Receptor AgonistsAdenosine A3 Receptor AntagonistsPrenylationMethyl n-Butyl KetoneNorbornanesRhodiumAnti-Anxiety AgentsCyclooctanesKetonesReceptor, Adenosine A3Structure-Activity RelationshipNucleosidesCyclopropanesSpectrophotometry, InfraredHexanesMolecular ConformationBornanesSulfur CompoundsVolatile Organic CompoundsCatalysisModels, MolecularPlant ExtractsDrug Evaluation, Preclinical