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2. Controlled Substance Act, 21 U.S.C. § 812; 1970.
3. Joint action 97/396/JHA: 1997 Joint action on new Synthetic drugs,1997
4. Council decision 2005/387/JHA on the information exchange, risk assessment and control of new psychoactive substances,2005
5. New psychoactive substances: 25 years of early warning and response in Europe. An update from the EU Early Warning System;European Monitoring Centre for Drugs and Drug Addiction,2022