20β-Dihydroprogesterone

20β-Dihydroprogesterone (20β-DHP), also known as 20β-hydroxyprogesterone (20β-OHP), is an endogenous metabolite of progesterone which is formed by 20β-hydroxysteroid dehydrogenase (20β-HSD).^[1] It is a progestogen similarly to progesterone, with about 20 to 50% of the progestogenic activity of progesterone.^[1][2] It can be converted by 20β-HSD into progesterone in the uterus.^[3] The effects of 20β-HSD on the uterus, mammary glands, and in maintaining pregnancy have been studied.^[3][4][5] The progestogenic activity of 20β-HSD has also been characterized in women.^[6][4]

20β-Dihydroprogesterone

Names
IUPAC name (20R)-20-Hydroxypregn-4-en-3-one
Systematic IUPAC name (1S,3aS,3bS,9aR,9bS,11aS)-1-[(1R)-1-Hydroxyethyl]-9a,11a-dimethyl-1,2,3,3a,3b,4,5,8,9,9a,9b,10,11,11a-tetradecahydro-7H-cyclopenta[a]phenanthren-7-one
Other names 20β-DHP; 20β-Hydroxyprogesterone; 20β-OHP; 20β-Progesterol; 20β-Progerol; 20β-Hydroxypregn-4-en-3-one; Pregn-4-en-20β-ol-3-one
Identifiers
CAS Number	145-15-3 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:36729
ChEMBL	ChEMBL2112756
ChemSpider	8612
ECHA InfoCard	100.005.137
PubChem CID	92747
UNII	67N4JZ6CHL Y
CompTox Dashboard (EPA)	DTXSID001314014
InChI InChI=1S/C21H32O2/c1-13(22)17-6-7-18-16-5-4-14-12-15(23)8-10-20(14,2)19(16)9-11-21(17,18)3/h12-13,16-19,22H,4-11H2,1-3H3/t13-,16+,17-,18+,19+,20+,21-/m1/s1 Key: RWBRUCCWZPSBFC-SJOKZOANSA-N
SMILES C[C@H]([C@H]1CC[C@@H]2[C@@]1(CC[C@H]3[C@H]2CCC4=CC(=O)CC[C@]34C)C)O
Properties
Chemical formula	C21H32O2
Molar mass	316.485 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

See also

• 20α-Dihydroprogesterone
• 17α-Hydroxyprogesterone
• 16α-Hydroxyprogesterone
• 5α-Dihydroprogesterone
• 11-Deoxycorticosterone

References

1. Bertram G. Katzung (30 November 2017). Basic and Clinical Pharmacology 14th Edition. McGraw-Hill Education. p. 728. ISBN 978-1-259-64116-9. In addition to progesterone, 20α- and 20β-hydroxyprogesterone (20α- and 20β-hydroxy-4-pregnene-3-one) also are found. These compounds have about one-fifth the progestational activity of progesterone in humans and other species.
2. Zander J, Forbes TR, Von Munstermann AM, Neher R (April 1958). "Delta 4-3-Ketopregnene-20 alpha-ol and delta 4-3-ketopregnene-20 beta-ol, two naturally occurring metabolites of progesterone; isolation, identification, biologic activity and concentration in human tissues". J. Clin. Endocrinol. Metab. 18 (4): 337–53. doi:10.1210/jcem-18-4-337. PMID 13513735.
3. Lisboa, B. P.; Holtermann, M. (1976). "METABOLISM OF 20β-HYDROXY-4-PREGNEN-3-ONE IN UTERINE TISSUE OF NON-PREGNANT RATS IN VITRO". Acta Endocrinologica. 83 (3): 604–620. doi:10.1530/acta.0.0830604. ISSN 0804-4643. PMID 989999.
4. Lauritzen, Christian (1963). "BIOLOGISCHE WIRKUNGEN DES 20β-HYDROXY-PREGN-4-EN-3-ON". Acta Endocrinologica. 44 (2): 225–236. doi:10.1530/acta.0.0440225. ISSN 0804-4643.
5. Kumaresan, P.; Turner, C. W. (1968). "A Comparison of 20 -hydroxy-pregn-4-ene-3-one and Progesterone on Mammary Gland Growth of the Rat". Experimental Biology and Medicine. 129 (3): 955–956. doi:10.3181/00379727-129-33466. ISSN 1535-3702. PMID 5725127. S2CID 29178686.
6. Besch, Paige K.; Barry, Roger D.; Vorys, Nichols; Stevens, Vernon; Ullery, John C. (1965). "A review of some aspects of the metabolism of progestational agents". Metabolism. 14 (3): 432–443. doi:10.1016/0026-0495(65)90031-4. ISSN 0026-0495. PMID 14261429.