<prompt> All the following are hormonal agents used against breast cancer exceptLetrozoleExemestaneTaxolTamoxifen  <response>: Refer Katzung 10th897 Letrozole, anastrozole and exemestane are aromatase inhibitors useful for the treatment of tamoxifen resistant breast cancer Tamoxifen is a SERM It is also used for breast cancer Taxol is commonly used term for paxclitaxel 