Letrozole Antineoplastic Raw Materials Femara If this item is in your favor, please feel free to contact me. Email ID: [email protected] Skype ID: lisa.li365 Synonym: Letrozole; Femara; Antineoplastic Raw Materials; Steroids; Hormone Powders; Raw Powder; Anti-estrogen; Aromatase Inhibitor; Breast Cancer Treatments CAS: 112809-51-5 Assay: 98.0-102.0%. Packing: 1Kg/foil bag or as required Delivery: Courier. MF: C17H11N5 MW: 285.3 Character: White crystalline powder. MP: 181-183C Usage: Letrozole is a powerful Aromatase Inhibitor that was developed to fight breast cancer. For athletes and bodybuilders, it is a drug used to combat the estrogenic side effects of anabolic steroids water-retention, acne and gynocomastia. It will also raise testosterone levels because of the lowered estrogen in the body. Side effects from Letrozole include a lowered sex drive and continuous use can lead to lowered lipid function and an impaired immune system.