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