5-碘哒嗪-3(2H)-酮

4-氯-5-肼-3(2H)-哒嗪

5-氨基-4-氯-3-哒嗪

4-amino-5-chloro-2H-pyridazin-3-one

4-氯-5-甲氧基哒嗪-3(2H)-酮