Butylone, also known as -keto-N-methylbenzodioxolylbutanamine (k-MBDB), is a phenethylamine chemical class entactogen, psychedelic, and stimulant psychoactive drug. It is the substituted methylenedioxyphenethylamine analogue of buphedrone and the -keto (substituted cathinone) analogue of MBDB.
Butylone (hydrochloride) is a cathinone-classified analytical reference material.
Butylone is a metabolite of bk-DMBDB that has been found in bath salt products.
Butylone is classified as a Schedule I substance in the United States. This product is intended for forensic and research purposes.

It has gained popularity as a recreational drug in the United Kingdom and Continental Europe. It has stimulant effects similar to amphetamines and cocaine, and the most common routes for recreational use are insufflation and oral ingestion. Overdosage with mephedrone has been reported, with fatalities.
Methylone, also known as bk-MDMA or M1, is the beta-keto analogue of methylenedioxymethamphetamine (MDMA). Butylone, also known as bk-MBDB, is the beta-keto analogue of methylbenzodioxylbutanamine (MBDB).

Mephedrone (aka meow, bubbles) powder on counter top in plastic bag

Methylone (bk-MDMA), ethylone (bk-MDEA), butylone (bk-MBDB), and mephedrone (4-methylmethcathinone) are beta-keto-substituted analogues of the corresponding amphetamines and appeared as new class on the illicit drug market. Due to their chemical similarity to amphetamines or methcathinone and the use as alternatives of these drugs, similar pharmacological and toxicological effects as described above could be postulated.
Metabolism of methylone and mephedrone was investigated in rat and abuser’s urine and the metabolism of ethylone and butylone only in abuser’s urine.

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