简介内容：GW5638 is a estrogen receptor ligand. GW5638 is a prodrug of its active metabolite GW7604. GW5638 appears to act as an antagonist in these in vitro systems, although in a manner distinct from other known ER modulators. GW5638 is also classified as a pseudo-SERD, which could form the basis of a new paradigm of breast cancer hormonal therapy in its own right.
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