1,3-dioxolanes with antitussive activity
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United States of America Patent
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Dec 28, 2004
Grant Date -
Feb 26, 2004
app pub date -
May 12, 2003
filing date -
Jul 28, 2000
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Abstract
(S)-3-(4-Phenyl-1-piperazinyl)-1,2-propanediol cyclic acetals useful as antitussive agents and as intermediates for the preparation of levodropropizine and the salts thereof, as well as a process for the preparation of said acetals, are disclosed.
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