3-Methylmethcathinone. 3-Methylmethcathinone is a designer drug belonging to the substituted cathinone family, which is also referred to as 3-MMC و metaphedrone. Since 3-MMC is a structural isomer of 4-MMC, it is unlawful in the majority of nations that have outlawed mephedrone. 3-MMC shares structural similarities with the more well-known …Web