Detmest velkendte stof i ecstasygruppen er 3,4-methylendioxy-metamfetamin (MDMA), men ofte findes andre beslægtedeanalogstoffer i ecstasytabletterne.
The best-known member of theecstasy group is 3,4-methylenedioxy-methamphetamine(MDMA), but other related analogues are also sometimesfound in ecstasy tablets.