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NEW CRYSTALLINE FORM AND PURE MODAFINIL, PROCESS OF PREPARING THEM, AND PHARMACEUTICAL COMPOSITIONS CONTAINING THE NEW CRYSTALLINE FORM
NEW CRYSTALLINE FORM AND PURE MODAFINIL, PROCESS OF PREPARING THEM, AND PHARMACEUTICAL COMPOSITIONS CONTAINING THE NEW CRYSTALLINE FORM
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机译:新的晶体形式和纯莫达非尼,制备过程以及包含新的晶体形式的药物成分
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摘要
The present invention provides an improved process for preparing modafinil, whereby it may be isolated in high purity by a single crystallization. The process produces modafinil free of sulphone products of over-oxidation and other byproducts. The invention further provides new crystalline Forms II-VI of modafinil and processes for preparing them. Each of the new forms is differentiated by a unique powder X-ray diffraction pattern. The invention further provides pharmaceutical compositions containing novel modafinil Forms II-IV and VI.
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