Phenylpiperazine (also known as 1-Phenylpiperazine, 202-165-6, N-Phenylpiperazine, Piperazine, 1-phenyl-, 1-Phenyl-piperazine, N-Phenyldiethylenediamine, 4-phenylpiperazine, n-phenyl piperazine, 1-Fenylpiperazin or N-phenylpiperazin) is a stimulant substance of the phenylpiperazine class.