n,n-didesmethyltamoxifen n,n-didesmethyltamoxifen 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. n,n-didesmethyltamoxifenclinical dataother namesdinortamoxifenidentifiers iupac name 2-phenoxy]ethanamine cas number80234-20-4pubchem cid3036172chemspider2300247keggc16548chebichebi:80556chemblchembl1743350chemical and physical dataformulac24h25nomolar mass343.470 g·mol−13d model (jsmol)interactive image smiles cc/c(=c(\c1=cc=cc=c1)/c2=cc=c(c=c2)occn)/c3=cc=cc=c3 inchi inchi=1s/c24h25no/c1-2-23(19-9-5-3-6-10-19)24(20-11-7-4-8-12-20)21-13-15-22(16-14-21)26-18-17-25/h3-16h,2,17-18,25h2,1h3/b24-23-key:mcjkbwhdnusjlw-vhxpqnkssa-n