2-(Dimethylamino)-3',4'-(methylenedioxy)butyrophenone Hydrochloride is a potential psychotropic drug of the amphetamine and cathinone class. 2-(Dimethylamino)-3',4'-(methylenedioxy)butyrophenone Hydrochloride is structurally related to Methylone , a designer drug and b-ketone analogue of MDMA (Ecstasy).