3,4-MethylenedioxyamphetamineN-Methyl-3,4-methylenedioxyamphetamineDeoxyepinephrineHallucinogensAmphetaminesSubstance Abuse DetectionMethamphetamineDesigner DrugsGas Chromatography-Mass SpectrometrySerotonin AgentsForensic ToxicologyStreet DrugsAmphetamineCentral Nervous System StimulantsSubstance PSpectrometry, Mass, Electrospray IonizationStereoisomerismChromatography, High Pressure LiquidReproducibility of Results