Read Edit View history 哒嗪 dāqín pyridazine Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 哒嗪/噠嗪 · dāqín · pyridazine 2026/03/04 哒嗪 / 噠嗪 dāqín pyridazine an organic heterocyclic compound with the molecular formula C4H4N2, specifically the 1,2-diazine isomer 哒嗪及其衍生物在医药和农药化学中具有重要用途。 noun created sense Mar 4, 2026, 02:25 AM