DFMDMA
DFMDMA, also known as F2-MDMA or as 3,4-(difluoromethylenedioxy)methamphetamine, is a chemical compound of the phenethylamine, amphetamine, and MDxx families related to the entactogen MDMA ("ecstasy"). It is the derivative of MDMA in which the two hydrogen atoms on the carbon atom of the 3,4-methylenedioxy ring have been replaced with fluorine atoms.