With the 1960s to the mid-nineteen eighties, reductive amination was the method of option for clandestine methamphetamine production. Enterprising biker gangs who dominated the trade at this time mainly ran these operations. (The slang expression “crank” for methamphetamine allegedly originated from bikers transporting meth inside the crankshafts of their bikes. https://marconkbta.techionblog.com/30057694/the-basic-principles-of-blue-copyright-for-sale