Biotin intermediate and process for preparing the same
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United States of America Patent
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Sep 21, 2010
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N/A
app pub date -
Jan 7, 2008
filing date -
Dec 4, 2001
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Abstract
represents cyano group, carboxyl group, an alkoxycarbonyl group, an alkylthiocarbonyl group, or a carbamoyl group which may have a substituent, or a salt thereof which comprises subjecting a compound represented by the formula (II-a): 2 wherein the symbols have the same meanings as defined above, or a salt thereof to ring transformation.
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