Exemestane Aromasin(CAS: 107868-30-4 ) Synonyms:Exemestan; aromasin;Exemestan;Exemestance ;buy Aromasin; China Exemestan CAS: 107868-30-4 MF: C20H24O2 MW: 296.4 Assay: 99% min. Appearance:white powder Chemical Properties white to light yellow crystal powder Usage: Exemestane is a drug used in the treatment of breast cancer in women who have gone throughmenopause. It may be used in women for whom adjuvant tamoxifen therapy is not working or in women with advanced breast cancer that is not responding to treatment. This drug is available by prescription only and women must be supervised by a doctor while they take it. It is sold under the brand name Aromasin? and some pharmacies may require advance notice to stock it because it is not a frequently used medication in some areas.