Cioteronel

Cioteronel
Clinical data
Other names	CPC-10997; Cyoctol; X-Andron
Routes of; administration	By mouth, topical
Drug class	Nonsteroidal antiandrogen
ATC code	None;
Identifiers
	IUPAC name 4-(5-methoxyheptyl)-3,3a,4,5,6,6a-hexahydro-1H-pentalen-2-one;
CAS Number	89672-11-7;
PubChem CID	55994;
ChemSpider	50555;
UNII	1RTH95874Z;
ChEMBL	ChEMBL2104105;
CompTox Dashboard (EPA)	DTXSID50869028 ;
Chemical and physical data
Formula	C16H28O2
Molar mass	252.398 g·mol−1
3D model (JSmol)	Interactive image;
	SMILES CCC(CCCCC1CCC2C1CC(=O)C2)OC;
	InChI InChI=InChI=1S/C16H28O2/c1-3-15(18-2)7-5-4-6-12-8-9-13-10-14(17)11-16(12)13/h12-13,15-16H,3-11H2,1-2H3; Key:KDULJHFMZBRAHO-UHFFFAOYSA-N;

Cioteronel (INNTooltip International Nonproprietary Name, USANTooltip United States Adopted Name; developmental code CPC-10997; former tentative brand names Cyoctol, X-Andron) is a nonsteroidal antiandrogen (NSAA) that was never marketed. It was under development between 1989 and 2001 for the topical treatment of androgenetic alopecia (male pattern baldness), and acne and for the oral treatment of benign prostatic hyperplasia; it reached phase III clinical trials for acne and phase II studies for androgenetic alopecia, but was ultimately discontinued due to poor efficacy.