N,N-Desmethyltamoxifen is a metabolite of tamoxifen, a selective estrogen receptor modulator (SERM). It is formed from N-desmethyltamoxifen and is an intermediate in the conversion of tamoxifen and N-desmethyltamoxifen into norendoxifen (4-hydroxy-N,N-desmethyltamoxifen), an active metabolite of tamoxifen.
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