Amphetamine derivatives, specially ring‐substituted examples, represented another phase inside the evolution of designer drugs. The ‘phenethylamine interval’, possible impressed with the publication in the ebook PiHKAL in 1991, would final to the early several years in the 20‐to start with century. In 1994, the U.S. Drug Enforcement Administration (DEA) https://arthurwpfuh.thelateblog.com/34004442/how-to-order-research-chemicals-in-china-without-hassle