dihydrofluoxymesterone dihydrofluoxymesterone dihydrofluoxymesterone (developmental code name u-7265) is an androgen and anabolic steroid (aas) which was never marketed. it was assessed in the treatment of breast cancer in women in at least one clinical study in the 1970s and showed effectiveness similar to that of other aas. the drug is the 5α-reduced analogue and metabolite of fluoxymesterone. dihydrofluoxymesteroneclinical dataother namesu-7265; 5α-dihydrofluoxymesterone; 9α-fluoro-11β-hydroxy-17α-methyl-5α-dihydrotestosterone; 9α-fluoro-11β-hydroxy-17α-methyl-5α-dht; 9α-fluoro-11β-hydroxy-17α-methyl-5α-androstan-17β-ol-3-oneroutes ofadministrationby mouthdrug classandrogen; anabolic steroidchemical and physical dataformulac20h30fo3molar mass337.455 g·mol−13d model (jsmol)interactive image smiles 12cc(c)(o)1(c)c(o)1(f)2()ccc2cc(=o)cc12c inchi inchi=1s/c20h30fo3/c1-17-8-6-13(22)10-12(17)4-5-15-14-7-9-19(3,24)18(14,2)11-16(23)20(15,17)21/h12,14-15,23-24h,4-11h2,1-3h3/t12-,14-,15-,17-,18-,19-,20-/m0/s1key:pqqvqmwimdihju-viifrjdqsa-n