MDEA stands for 3,4-methylenedioxy-N-ethylamphetamine. It is very similar to MDMA, the active chemical in the drug Ecstasy. MDEA differs from MDMA in that it has one more Carbonatom, and two more Hydrogen atoms, making up a Hydrocarbon. The difference is evidenced in its name by the Ethylprefix, rather than the Methyl prefix designating only one hydrocarbon (see Alkanes). MDEA has also been sold as a cheaper substitute for Ecstasy on the Black Market.