Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Butylone, also known as -keto-N-methylbenzodioxolylpropylamine (bk-MBDB), is an entactogen, psychedelic, and stimulant of the phenethylamine chemical class. It is the -keto analogue of MBDB. Butylone was first synthesized by Koeppe, Ludwig and Zeile which is mentioned in their 1967 paper. It remained an obscure product of academia until 2005 when it was synthesized by a chemical supply company, and has since continued to be sold as a research chemical. It has since been explored as a possible entheogen.

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