tert-Butyl 4-(pyrimidin-5-yl)piperazine-1-carboxylate

1-(2-氟乙基)-哌嗪

1-Boc-4-(5-溴吡啶-3-基)哌嗪

4-异丁基哌嗪-1-羧酸叔丁酯

1-Boc-4-丁基哌嗪