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DU-41165

Clinical data
Other names	6-Fluoro-16-methylene-17α-acetoxy-δ-retroprogesterone; 6-Fluoro-16-methylene-17α-hydroxy-9β,10α-pregna-4,6-diene-3,20-dione 17α-acetate; 6-Fluoro-16-methylene-3,20-dioxo-9β,10α-pregna-4,6-dien-17α-yl acetate
Routes of administration	By mouth
Drug class	Progestin; Progestogen
Identifiers
IUPAC name phenanthren-17-yl] acetate
CAS Number	34184-58-2
PubChem CID	169573
ChemSpider	148298
UNII	5M4PL394K5
CompTox Dashboard (EPA)	DTXSID60955729
Chemical and physical data
Formula	C24H29FO4
Molar mass	400.490 g·mol
3D model (JSmol)	Interactive image
SMILES CC(=O)1(C(=C)C21(CC32C=C(C4=CC(=O)CC34C)F)C)OC(=O)C
InChI InChI=1S/C24H29FO4/c1-13-10-19-17-12-21(25)20-11-16(28)6-8-22(20,4)18(17)7-9-23(19,5)24(13,14(2)26)29-15(3)27/h11-12,17-19H,1,6-10H2,2-5H3/t17-,18-,19+,22+,23+,24+/m1/s1 Key:XSSIGSNQDKHHLD-JBARXXBASA-N

DU-41165, also known as 6-fluoro-16-methylene-17α-acetoxy-δ-retroprogesterone, is a progestin which was developed by Philips-Duphar in the 1970s and was never marketed. It is a combined derivative of 17α-hydroxyprogesterone and retroprogesterone. The drug shows extremely high potency as a progestogen in animals. It has been found to possess 158% of the relative binding affinity of promegestone for the progesterone receptor expressed in rat uterus (relative to 74% for the closely related progestin DU-41164). DU-41165 also showed 28% of the affinity of RU-28362 for the glucocorticoid receptor expressed in rat liver, but no affinity for the mineralocorticoid receptor expressed in rat kidney (<0.003% of that of RU-26752). The drug showed no androgenic, anabolic, or estrogenic activity in animals, but did show some antiandrogenic and glucocorticoid activity at high doses. Although highly potent in animals, DU-41165 produced little or no progestogenic effect at dosages of 50 and 200 μg/day in women, suggesting major species differences. DU-41165 has been studied as a potential photoaffinity label for the progesterone receptor.

References

1. ^ Morsink L, de Wachter AM, Brenner P, Cekan SZ, Guerrero R, Hagenfeldt K, Diczfalusy E (May 1976). "Endocrine effects of two new retro-steroids in animal models and in women". Acta Endocrinol. 82 (1): 193–212. doi:10.1530/acta.0.0820193. PMID 57688.
2. ^ Pinney KG, Carlson KE, Katzenellenbogen JA (February 1990). "DU41165: a high affinity ligand and novel photoaffinity labeling reagent for the progesterone receptor". J. Steroid Biochem. 35 (2): 179–89. doi:10.1016/0022-4731(90)90272-T. PMID 2308335.

• Abandoned drugs
• Acetate esters
• Diketones
• Organofluorides
• Glucocorticoids
• Pregnanes
• Progestogens
• Steroidal antiandrogens
• Enones
• Conjugated dienes
• Vinylidene compounds