3.1 Introduction Vitamins are classically defined as a group of organic compounds required in very small amounts for the normal development and functioning of the body. They are not synthesised by the body, or only in insufficient amounts, and are mainly obtained through food (Machlin and Huni, 1994). There are thirteen vitamins: four are fat-soluble, namely vitamins A (retinol)

一、有机化合物和有机化学 1、有机化学、有机化合物的定义 有机化学（organic chemistry）是研究有机化合物 的来源、制备、结构、性能、应用以及有关理论和方 法学的科学。 自从拉瓦锡（Lavoisier.A.L)和李比希（Von Liebig.J.F) 创造有机化合物的分析方法之后，发现有机化合物均含 有碳元素，绝大多数的含氢元素，此外，很多的有机化 合物还含氧、硫、氮等元素

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Angew. Chem. Int Ed. 2000, 39, 2812-2833 \That outpost of empire Australia, produces some curious mammalia, the kangaroo rat, the blood-sucking bat, and Aurthur J. Birch, inter alia.\ If you are anxious for over-exposure, to prepublication disclosure, to good food and good drink

Chemistry 206 Advanced Organic Chemistry Handout 27A Vicinal Elimination Reactions: An Overview Matthew D. Shair Wednesday

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