1-硝基哌嗪

4-氯-6-硝基-2-(1-哌嗪)喹啉

1-(4-甲氧基-吡啶-2-基)-哌嗪

2-溴-5-(哌嗪-1-基)吡嗪

{4-[(cyano)(phenyl)methyl]piperazin-1-yl}(phenyl)acetonitrile