prostanozol prostanozol prostanozol, also known as demethylstanozolol tetrahydropyran ether, is an androgen/anabolic steroid (aas) and designer steroid which acts as a prodrug of the 17α-demethylated analogue of stanozolol (winstrol). it was found in 2005 as an ingredient of products sold as "dietary supplements" for bodybuilding. prostanozolclinical dataother names17α-demethylstanozolol 17β-tetrahydropyran ether; 17β--5α-androst-2-enopyrazole; pyrazole-5α-etioallocholane-17β-tetrahydropyranol; 17β--2'h-5α-androst-2-enopyrazole; pyrazolo-5α-androstan-17β-ol 17β-tetrahydropyran etherroutes ofadministrationby mouthdrug classandrogen; anabolic steroid; androgen etheridentifiers iupac name (1s,3as,3br,5as,10as,10bs,12as)-10a,12a-dimethyl-1-((tetrahydro-2h-pyran-2-yl)oxy)-1,2,3,3a,3b,4,5,5a,6,7,10,10a,10b,11,12,12a-hexadecahydrocyclopentanaphthoindazole cas number1186001-41-1pubchem cid56842253chemspider32700007 yuniijnu1579m5dcomptox dashboard (epa)dtxsid40152178 chemical and physical dataformulac25h38n2o2molar mass398.591 g·mol−13d model (jsmol)interactive image smiles c12cc3(1cc2oc4cccco4)cc53(cc6=c(c5)nn=c6)c (verify) it is one of hundreds of drugs banned from the olympics by the ioc. russian marathon runner lyubov denisova was banned for two years from competition after testing positive for prostanozol and testosterone in 2007.