1-(2-氯乙基)-4-苯基哌嗪

1,2-bis-(4-phenyl-piperazino)-ethane

3-[2-(4-苯基-1-哌嗪基)乙基]吲哚

ethyl 4-[4-(3-oxoprop-1-ynyl)phenyl]piperazine-1-carboxylate

N,4-diphenylpiperazine-1-carboxamide