This thesis aims at the studies on the synthesis of (20S)-20-hydroxycholestane-3, 16-dione (1). It consists of the following three parts:PartⅠ: The first synthesis of (20S)-20-hydroxycholestane-3, 16-dione We designed a synthetic pathway to compound (1) depending on its structural character.
本论文以(20S)-20-羟基胆甾烷-3，16-二酮(1)的合成为主要研究目标，共包括以下三部分：第一部分：(20S)-20-羟基胆甾烷-3，16-二酮的首次合成根据化合物(1)的结构特征，设计了其合成路线。
参考来源 - （20S）First,paper simplely deeply analyse land supply and housing supply of residential market of Gan Zhou city center,define future houing supply region and structural character.
首先,论文对赣州中心城区住宅市场中土地供应和住宅供应做出深入分析,明确赣州中心城区未来的住宅供应区域和结构特征。
参考来源 - 赣州市中心城区住宅房地产市场供需研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Basin structural character contains much information about flood hazard.
流域结构特征包含着丰富的洪水危险性信息。
The structural character and principle of motor fuel delivery pump is presented.
介绍了汽车燃油泵的结构特点及工作原理。
The structural character of the samples that influences chiral recognition was discussed.
对样品分子中影响手性拆分的结构特征进行了讨论。
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