4-(1H-吡唑并[3,4-d]-4-嘧啶)-哌嗪-1-羧酸叔丁酯

4-(1H-苯并咪唑-2-基)-哌嗪-1-羧酸叔丁酯

4-(4-(乙氧基羰基)苯基)哌嗪-1-羧酸叔丁酯

4-(3-羧基丙酰基)-哌嗪-1-羧酸叔丁酯

4-(4-Boc-哌嗪-1-羰基) 苯硼酸频哪酯