1-but-3-ynyl-4-pyridin-2-ylpiperazine

1-甲基-4-(2-吡啶基)哌嗪

1-(6-溴-2-吡啶基)哌嗪

4-pyridin-2-ylpiperazine-1-carbonyl chloride

1-(6-氯吡啶-2-基)哌嗪