Trifluoromethylphenylpiperazine
meta-Trifluoromethylphenylpiperazine (TFMPP) is a recreational drug of the phenylpiperazine chemical class and is a substituted piperazine. Usually in combination with benzylpiperazine (BZP) and other analogues, it is sold as an alternative to the illicit drug MDMA ("Ecstasy").
Source: Wikipedia — Trifluoromethylphenylpiperazine (CC BY-SA 4.0)