title: Identification of a new metabolite of tamoxifen in patient serum during breast cancer therapy.
mesh_terms: D001943:Breast Neoplasms / Q000097:blood* / Q000188:drug therapy; D005260:Female; D006801:Humans; D013058:Mass Spectrometry; D013629:Tamoxifen / Q000097:blood* / Q000627:therapeutic use
chemical_list: D013629:Tamoxifen