Heteroatoms-containing tricyclic compounds
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United States of America Patent
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Apr 7, 2009
Grant Date -
Mar 20, 2008
app pub date -
Oct 10, 2005
filing date -
Oct 12, 2004
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Abstract
A process for the production of 33-Epi-33-chloro-FR 520 in one step from FR520 wherein protecting groups are avoided.
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