制药工程专业英语课文翻译单元译文

Unit 1 Production of DrugsDepending on their production or origin pharmaceutical agents can be split

Unit 1Production of Drugs Depending on their production or origin pharmaceutical agents can be split into three groups: I.Totally synthetic materials (synthetics) ， Ⅱ.Natural productsand ， Ⅲ.Products from partial syntheses (semi-synthetic products). The emphasis of the present book is on the most important compounds of groups Iand Ⅲ 一 thus Drug synthesis. This does not meanhoweverthat natural products or other agents are less ，， important. They can serve as valuable lead structuresand they are frequently needed as starting ， materials or as intermediates for important synthetic products. Table 1gives an overview of the different methods for obtaining pharmaceutical agents. 1 单元生产的药品 其生产或出身不同药剂可以分为三类： 1 。完全（合成纤维）合成材料， Ⅱ。天然产物，和 Ⅲ。产品从（半合成产品）的部分合成。 本书的重点是团队的最重要的化合物Ⅰ和Ⅲ一所以药物合成。这并不意味着，但是，天然产品或其他代理人 并不太重要。它们可以作为有价值的领导结构，他们经常为原料，或作为重要的合成中间体产品的需要。 1 表给出了获取药剂的不同方法的概述。 Table 1Possibilities for the preparation of drugs Methods Examples 1. Total synthesis -over 75 %of all pharmaceutical agents (synthetics) 2. Isolation from natural sources (natural products): 2.1 Plants -alkaloids;enzymes;heart glycosides;polysaccharides;tocopherol; steroid precursors (diosgenin, sitosterin);citral (intermediate product for