Tamoxifen-d5 is a deuterated form of Tamoxifen. Tamoxifen is an orally active selective estrogen receptor modulator (SERM) that blocks estrogen action in breast cells while activating estrogenic activity in other cells, such as those in bone, liver, and uterus. Tamoxifen is also a potent activator of Hsp90 and enhances the ATPase activity of the Hsp90 molecular chaperone.
