<unk>  is a phenylpiperazine and is chemically related to nefazodone, etoperidone, and trazodone. It is unusual in having twelve known crystalline polymorphs.
Aripiprazole
Electroconvulsive therapy
Risperidone
Clozapine
Olanzapine
Asenapine
Ziprasidone
Lorpiprazole