CyclizationAcid Sensing Ion Channel BlockersStereoisomerismKineticsCatalysisMolecular StructureModels, ChemicalAlkenesAlkynesIntramolecular LyasesLewis AcidsPalladiumAcetalsEnzymesOxidation-ReductionSubstrate SpecificityModels, MolecularKetonesPolyisoprenyl PhosphatesHydrogen-Ion ConcentrationChemistry, OrganicAlkadienesThermodynamicsMolecular ConformationMagnetic Resonance SpectroscopyPyransPeptides, CyclicDiffusionCycloparaffins