4-甲氧基哒嗪

4-chloro-5-methoxy-2-phenylpyridazin-3-one

4-氯-5-羟基3(2H)-哒嗪

5-甲氧基哒嗪-3-酮

4-氯-5-甲氧基-2-甲基-2,3-二氢哒嗪-3-酮