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US07074819B2 Benzopyran or thiobenzopyran derivatives 失效
苯并吡喃或硫代苯并吡喃衍生物

Benzopyran or thiobenzopyran derivatives
摘要:
The present invention relates to a novel benzopyran or thiobenzopyran derivative represented by formula (1): pharmaceutically acceptable salt or stereoisomer thereof, in which X, R1, R2, R3, R4 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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