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Order Butylone Online with Fast & Discreet Shipping at Citychemiststore Butylone (also known as β-keto-N-methylbenzodioxolylbutanamine, βk-MBDB, or B1) is a synthetic entactogen and stimulant of the phenethylamine and cathinone classes. Butylone is the β-keto analog of MBDB and the substituted methylenedioxy analogue of buphedrone. As a designer drug, it is sold on the street along with ethylone …