Pyridine is a six-membered heterocyclic compound containing one nitrogen heteroatom. Pyridine and piperidine are the most frequently occurring heterocyclic building blocks in drug molecules. According to incomplete statistics, there are currently more than 180 drugs containing pyridine or piperidine structure that have been marketed, nearly 1/5 of the drugs approved for marketing in recent years contain these two structures.
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Pyridine is a basic heterocyclic organic compound with the chemical formula C5H5N. It is structurally related to benzene, with one methine group (=CH−) replaced by a nitrogen atom. It is a highly flammable, weakly alkaline, water-miscible liquid with a distinctive, unpleasant fish-like smell.
Dioxane, an organic compound, also known as dioxane, 1,4-dioxane, is an organic substance, the molecular formula is C4H8O2. It is a colorless and transparent liquid, slightly fragrant, miscible with water, miscible most organic solvents. The compound is used in the manufacture of special fine chemicals such as medicine, cosmetics, and fragrance, as well as as a solvent, reaction medium, and extraction agent in scientific research.
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