PiperidinesAlkaloidsPacific StatesPinus ponderosaReceptors, PhencyclidineErgot AlkaloidsPipecolic AcidsReceptors, sigmaIndole AlkaloidsPyrrolizidine AlkaloidsVinca AlkaloidsStereoisomerismPhencyclidineCyclizationMolecular StructureCinchona AlkaloidsDiphenylacetic AcidsHeterocyclic Compounds, Bridged-RingBerberine AlkaloidsImino SugarsAminationAmaryllidaceae AlkaloidsPyrrolidinesOrganosilicon CompoundsLobelineHaloperidolStructure-Activity RelationshipHeterocyclic Compounds, 2-RingAconitumAmino AlcoholsReceptor, Muscarinic M1Molecular ConformationMonoacylglycerol LipasesAporphinesAlkenesReceptors, NeurotransmitterClavicepsPiperidonesDioxolanesN-MethylaspartatePhenazocineRadioligand AssayDioxolesBenzodioxolesCatharanthusBenzylisoquinolinesBenzylidene CompoundsPepstatinsCadaverineMagnetic Resonance SpectroscopyDelphiniumReceptors, OpioidMuscarinic AgonistsPiperazinesPapaverineDose-Response Relationship, DrugSolanaceous AlkaloidsBerberineReceptors, N-Methyl-D-AspartateDizocilpine MaleateCatalysisPlant ExtractsReceptors, MuscarinicReceptor, Serotonin, 5-HT2ANeotyphodiumCoptisRutaceaeModels, ChemicalPlant PoisoningHydroxyl RadicalLigandsChromatography, High Pressure LiquidFentanylErgotismLycopodiumErgotamineBiotransformationGuinea PigsAlkylation2-Amino-5-phosphonovalerateMicrosomes, LiverInjections, Intra-ArterialLysergic AcidModels, MolecularPapaverRubiaceaeAspartic AcidBinding, CompetitiveExcitatory Amino Acid AntagonistsMuscarinic AntagonistsPhotochemistryCHO CellsRats, Sprague-DawleyEphedraVertebral ArteryDNABelladonna AlkaloidsKineticsHarmineGuanine