7α-Methylestradiol (7α-Me-E2), also known as 7α-methylestra-1,3,5(10)-triene-3,17β-diol, is a synthetic estrogen and an active metabolite of the androgen/anabolic steroid trestolone.[1][2][3] It is considered to be responsible for the estrogenic activity of trestolone.[2][3] The compound shows about the same affinity for the estrogen receptor as estradiol.[1]

Clinical data
Other names7α-Methyl-E2; 7α-Me-E2; 7α-Methylestra-1,3,5(10)-triene-3,17β-diol
Drug classEstrogen
  • (7R,8R,9S,13S,14S,17S)-7,13-Dimethyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthrene-3,17-diol
CAS Number
  • 10448-97-2 checkY
PubChem CID
Chemical and physical data
Molar mass286.415 g·mol−1
3D model (JSmol)
  • [H][C@@]12CC[C@H](O)[C@@]1(C)CC[C@]1([H])C3=CC=C(O)C=C3C[C@@H](C)[C@@]21[H]
  • InChI=1/C19H26O2/c1-11-9-12-10-13(20)3-4-14(12)15-7-8-19(2)16(18(11)15)5-6-17(19)21/h3-4,10-11,15-18,20-21H,5-9H2,1-2H3/t11-,15-,16+,17+,18-,19+/s2
Relative affinities (%) of 7α-methylestradiol and related steroids[1][4][5][6]
Estradiol 2.6 7.9 100 0.6 0.13 8.7 <0.1
7α-Methylestradiol 1–3 15–25 101 <1 <1 ? ?
Trestolone 50–75 100–125 ? <1 ? ? ?
Values are percentages (%). Reference ligands (100%) were progesterone for the PR, testosterone for the AR, E2 for the ER, DEXA for the GR, aldosterone for the MR, DHT for SHBG, and cortisol for CBG.

See alsoEdit


  1. ^ a b c Raynaud, J.P.; Ojasoo, T.; Bouton, M.M.; Philibert, D. (1979). "Receptor Binding as a Tool in the Development of New Bioactive Steroids". Drug Design. pp. 169–214. doi:10.1016/B978-0-12-060308-4.50010-X. ISBN 9780120603084.
  2. ^ a b García-Becerra R, Ordaz-Rosado D, Noé G, Chávez B, Cooney AJ, Larrea F (2012). "Comparison of 7α-methyl-19-nortestosterone effectiveness alone or combined with progestins on androgen receptor mediated-transactivation". Reproduction. 143 (2): 211–9. doi:10.1530/REP-11-0171. PMID 22065861.
  3. ^ a b Attardi BJ, Pham TC, Radler LC, Burgenson J, Hild SA, Reel JR (June 2008). "Dimethandrolone (7,11β-dimethyl-19-nortestosterone) and 11β-methyl-19-nortestosterone are not converted to aromatic A-ring products in the presence of recombinant human aromatase". The Journal of Steroid Biochemistry and Molecular Biology. 110 (3–5): 214–22. doi:10.1016/j.jsbmb.2007.11.009. PMC 2575079. PMID 18555683.
  4. ^ Ojasoo T, Delettré J, Mornon JP, Turpin-VanDycke C, Raynaud JP (1987). "Towards the mapping of the progesterone and androgen receptors". J. Steroid Biochem. 27 (1–3): 255–69. doi:10.1016/0022-4731(87)90317-7. PMID 3695484.
  5. ^ Ojasoo T, Raynaud JP (November 1978). "Unique steroid congeners for receptor studies". Cancer Res. 38 (11 Pt 2): 4186–98. PMID 359134.
  6. ^ Raynaud JP, Bouton MM, Moguilewsky M, Ojasoo T, Philibert D, Beck G, Labrie F, Mornon JP (January 1980). "Steroid hormone receptors and pharmacology". J. Steroid Biochem. 12: 143–57. doi:10.1016/0022-4731(80)90264-2. PMID 7421203.