16α-Hydroxyandrostenedione

16Î±-Hydroxyandrostenedione
Names
	IUPAC name 16Î±-Hydroxyandrost-4-ene-3,17-dione
	Systematic IUPAC name (2R,3aS,3bR,9aR,9bS,11aS)-2-Hydroxy-9a,11a-dimethyl-2,3,3a,4,5,8,9,9a,9b,10,11,11a-dodecahydro-1H-cyclopenta[a]phenanthrene-1,7(3bH)-dione
	Other names 16Î±-OH-A4
Identifiers
CAS Number	63-02-5;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:27582;
ChEMBL	ChEMBL1908014;
ChemSpider	389474;
PubChem CID	440574;
UNII	JN8H7214IR;
CompTox Dashboard (EPA)	DTXSID20331500 ;
	InChI InChI=1S/C19H26O3/c1-18-7-5-12(20)9-11(18)3-4-13-14(18)6-8-19(2)15(13)10-16(21)17(19)22/h9,13-16,21H,3-8,10H2,1-2H3/t13-,14+,15+,16-,18+,19+/m1/s1 Key: SSBCZTXGVMMZOT-NBBHSKLNSA-N;
	SMILES C[C@]12CCC(=O)C=C1CC[C@@H]3[C@@H]2CC[C@]4([C@H]3C[C@H](C4=O)O)C;
Properties
Chemical formula	C19H26O3
Molar mass	302.414 g/mol
	Except where otherwise noted, data are given for materials in their standard state (at 25 Â°C [77 Â°F], 100 kPa). Infobox references

16Î±-Hydroxyandrostenedione (16Î±-OH-A4), also known as 16Î±-hydroxyandrost-4-ene-3,17-dione, is an endogenous and naturally occurring steroid and metabolic intermediate in the biosynthesis of estriol during pregnancy.^[1]^[2]^[3] It is produced from dehydroepiandrosterone (DHEA), which is converted into 16Î±-hydroxy-DHEA sulfate, then desulfated and aromatized into 16Î±-hydroxyestrone, and finally converted into estriol by 17Î²-hydroxysteroid dehydrogenase.^[1]^[2]

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