19-noretiocholanolone 19-noretiocholanolone 19-noretiocholanolone, also known as 5β-estran-3α-ol-17-one, is a metabolite of nandrolone (19-nortestosterone) and bolandione (19-norandrostenedione) that is formed by 5α-reductase. it is on the list of substances prohibited by the world anti-doping agency since it is a detectable metabolite of nandrolone, an anabolic-androgenic steroid (aas). 19-noretiocholanoloneclinical dataother namesnoretiocholanolone; 5β-estran-3α-ol-17-one; 3α-hydroxy-5β-estran-17-oneidentifiers iupac name (3r,5r,8r,9r,10s,13s,14s)-3-hydroxy-13-methyl-2,3,4,5,6,7,8,9,10,11,12,14,15,16-tetradecahydro-1h-cyclopentaphenanthren-17-one cas number33036-33-8pubchem cid14009228chemspider19347817uniio5z6602i6uchemical and physical dataformulac18h28o2molar mass276.420 g·mol−13d model (jsmol)interactive image smiles c12cc34cc(c4cc31ccc2=o)o inchi inchi=1s/c18h28o2/c1-18-9-8-14-13-5-3-12(19)10-11(13)2-4-15(14)16(18)6-7-17(18)20/h11-16,19h,2-10h2,1h3/t11-,12-,13+,14-,15-,16+,18+/m1/s1key:uouiargwrphdbx-dhmvhtbwsa-n traces of 19-noretiocholanolone may be naturally present in human urine. consumption of boar meat, liver, kidneys and heart have been found to increase urinary 19-noretiocholanolone output.