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Liquid chromatogram of methedrone present in Bliss A7. Conditions: column: (S,S)-Whelk-O® 1, mobile phase n-hexane (Hex)/ethanol (EtOH)/triethylamine (TEA)/trifluoroacetic acid (95:5:0.05:0.05, v/v/v/v), flow rate 1 mL/min, ultraviolet (UV) detection 254 nm
