Ospemifene D4 (FC1271a D4; FC-1271a D4) is a tetra-deuterated form of Ospemifene (Osphena), which is an orally bioactive medication and a selective estrogen receptor modulator (SERM) approved for the treatment of dyspareunia. Ospemifene-d₄ can be used as an internal standard for the quantification of ospemifene by GC- or LC-MS.

纯度：≥98%