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Chemical structures of the traditional psychostimulants methamphetamine (METH) and methylenedioxymethamphetamine (MDMA), first-generation synthetic cathinones methylenedioxypyrovalerone (MDPV) and methylone, and second-generation synthetic cathinones α‐pyrrolidinopentiophenone (α-PVP) and 4-methyl-N-ethcathinone (4-MEC).
