Giredestrant, also known as GDC-9545 and RG6171, is a SERD. GDC-9545 is an orally available selective estrogen receptor degrader/downregulator (SERD), with potential antineoplastic activity. Upon oral administration, SERD GDC-9545 specifically targets and binds to the estrogen receptor (ER) and induces a conformational change that promotes ER degradation.
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