5α-Androst-2-ene-17-one

5α-Androst-2-ene-17-one
Clinical data

Other names	5α-Androst-2-en-17-one; 17-Oxo-5α-androst-2-ene; Delta-2-androst-17-one; (+)-Androst-2-en-17-one; Occlesterone
Routes of administration	Oral
Identifiers
IUPAC name (5S,8R,9S,10S,13S,14S)-10,13-Dimethyl-1,4,5,6,7,8,9,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-17-one
CAS Number	963-75-7^Y
PubChem CID	239425
ChemSpider	92089^Y
UNII	AHC8P4E4ZL
CompTox Dashboard (EPA)	DTXSID30914585
ECHA InfoCard	100.012.289
Chemical and physical data
Formula	C₁₉H₂₈O
Molar mass	272.432 g·mol⁻¹
3D model (JSmol)	Interactive image
SMILES C[C@@]34CC[C@H]2[C@@H](CCC1C\C=C/C[C@@]12C)[C@@H]4CCC3=O
InChI InChI=InChI==1S/C19H28O/c1-18-11-4-3-5-13(18)6-7-14-15-8-9-17(20)19(15,2)12-10-16(14)18/h3-4,13-16H,5-12H2,1-2H3/t13-,14+,15+,16+,18+,19+/m1/s1^Y Key:ISJVDMWNISUFRJ-HKQXQEGQSA-N^Y

5α-Androst-2-en-17-one, known by the nickname Delta-2, is an endogenous, naturally occurring, orally active anabolic-androgenic steroid (AAS) and a derivative of dihydrotestosterone (DHT). It is a metabolite of dehydroepiandrosterone (DHEA) in the body and is also a pheromone found in elephants and boars. 5α-Androst-2-en-17-one has been sold on the Internet as a "dietary supplement". It resembles desoxymethyltestosterone (17α-methyl-5α-androst-2-en-17β-ol) in chemical structure and may act as an androgen prohormone.