Process for the preparation of pure risedronic acid or salts
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United States of America Patent
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Dec 13, 2011
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app pub date -
May 9, 2007
filing date -
May 11, 2006
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Abstract
The present invention relates to an industrially advantageous process of making bisphosphonic acid or its salt in particular risedronic acid, [1-hydroxy-2(3-pyridinyl)ethylidene]bisphosphonic acid, having formula-(I) or its salts in high purity and high yields.
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