What exactly is three,4-DMMC?3,4-DMMC, also known as three,4-Dimethylmethcathinone, is usually a synthetic stimulant belonging into the cathinone household. Cathinones are psychoactive substances which have consequences much like amphetamines, and three,4-DMMC isn't any exception. It shares structural similarities with mephedrone (four-MMC), A diff