Chemistry is traditionally divided into organic and inorganic chemistry. category: pyridazine, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 19064-67-6
Synthesis and antihypertensive activity of novel 6-substituted-3-pyridazinylhydrazones
The synthesis and hypotensive properties of a series of 6-substituted-3-pyridazinylhydrazones are described. The most active compound of the series. 1-(6-morpholino-3-pyridazinyl)-2-[1-(tert-butoxycarbonyl)-2-propylidene] hydrazine, is a more potent hypotensive agent than hydralazine with a longer duration of action and a lower toxicity. Structure-activity relationships are discussed.
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Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N768 – PubChem