Benzopyran or thiobenzopyran derivatives
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United States of America Patent
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Jul 11, 2006
Grant Date -
May 27, 2004
app pub date -
Aug 12, 2003
filing date -
Jun 13, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a novel benzopyran or thiobenzopyran derivative represented by formula (1): pharmaceutically acceptable salt or stereoisomer thereof, in which X, R.sub.1, R.sub.2, R.sub.3, R.sub.4 and A are defined as described in the specification, and to a process for preparation thereof and a pharmaceutical composition having anti-estrogenic activity which contains the compound (1) as an active component.
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