ThiophenesBenzeneFuransEchinops PlantBenzene DerivativesChemistry Techniques, SyntheticMolecular StructureAnisolesCyclizationHeterocyclic CompoundsPalladiumSorbic AcidSulfur CompoundsCombinatorial Chemistry TechniquesStructure-Activity RelationshipTolueneHydroquinonesXylenesPhenolStereoisomerismCatalysisOccupational ExposureOxidation-ReductionModels, Molecular