7α-Methylestradiol

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]

Relative affinities (%) of 7α-methylestradiol and related steroids[1][4][5][6]

Compound	PR	AR	ER	GR	MR	SHBG	CBG
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.

Not to be confused with Methylestradiol.

7α-Methylestradiol

Clinical data
Other names	7α-Methyl-E2; 7α-Me-E2; 7α-Methylestra-1,3,5(10)-triene-3,17β-diol
Drug class	Estrogen
Identifiers
IUPAC name (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
PubChem CID	10424124
Chemical and physical data
Formula	C19H26O2
Molar mass	286.415 g·mol^−1
3D model (JSmol)	Interactive image
SMILES [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 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 Key:DXWWYJWUFULMAP-BQXDHOISNA-N

See also

• List of estrogens
• Methylestradiol
• Ethylestradiol
• Ethinylestradiol
• Almestrone

References

1. Raynaud, J.P.; Ojasoo, T.; Bouton, M.M.; Philibert, D. (1979). "Receptor Binding as a Tool in the Development of New Bioactive Steroids": 169–214. doi:10.1016/B978-0-12-060308-4.50010-X. Cite journal requires |journal= (help)
2. 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. 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.