1-(4-联苯基)-哌嗪

1-(4-溴苄基)哌嗪

1-(4,5-二苯基-1,3-恶唑-2-基)哌嗪

1-(4-hexanoylpiperazin-1-yl)hexan-1-one

2-硝基-5-哌嗪-1-苯甲酸