1,4-Bis(2-phenylethyl)piperazine dihydrochloride 1,4-Diphenethylpiperazine dihydrochloride 5470-57-5 F 257 NSC 27660 Piperazine, 1,4-bis(2-phenylethyl)-, dihydrochloride (9CI) Piperazine, 1,4-diphenethyl-, dihydrochloride