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Other names | DP-TAT-59 |
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Formula | C29H35NO2 |
Molar mass | 429.604 g·mol−1 |
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Miproxifene (INN) (former developmental code name DP-TAT-59) is a nonsteroidal selective estrogen receptor modulator (SERM) of the triphenylethylene group that was never marketed.[1][2] It is a derivative of afimoxifene (4-hydroxytamoxifen) in which an additional 4-isopropyl group is present in the β-phenyl ring.[3] The drug has been found to be 3- to 10-fold more potent than tamoxifen in inhibiting breast cancer cell growth in in vitro models.[1][4][5] Miproxifene is the active metabolite of miproxifene phosphate (TAT-59), a phosphate ester and prodrug of miproxifene that was developed to improve its water solubility.[1][2][6][7] Miproxifene phosphate was under development for the treatment of breast cancer and reached phase III clinical trials for this indication but development was discontinued.[1]