turosteride turosteride turosteride (fce-26,073) is a selective inhibitor of the enzyme 5α-reductase which was under investigation by glaxosmithkline for the treatment of benign prostatic hyperplasia (bph), but was never marketed. similarly to finasteride, turosteride is selective for the type ii isoform of 5α-redcutase, with about 15-fold selectivity for it over type i isoform of the enzyme. in animal studies it has been shown to inhibit prostate size and retard tumor growth. it may also be useful for the treatment of acne and hair loss. turosterideclinical dataother names1-(4-methyl-3-oxo-4-aza-5-alpha-androstane-17-beta-carbonyl)-1,3- diisopropylurearoutes ofadministrationoralatc codenonelegal statuslegal status never marketed identifiers iupac name (4ar,4bs,6as,7s,9as,9bs,11ar)-1,4a,6a-trimethyl-2-oxo-n-(propan-2-yl)-n-(propan-2-ylcarbamoyl)hexadecahydro-1h-indenoquinoline-7-carboxamide cas number137099-09-3pubchem cid65986chemspider59380uniilu1ltk666wchemical and physical dataformulac27h45n3o3molar mass459.675 g·mol−13d model (jsmol)interactive image smiles o=c(nc(c)c)n(c(=o)21(cc3(1cc2)cc4n(c(=o)cc34c)c)c)c(c)c inchi inchi=1s/c27h45n3o3/c1-16(2)28-25(33)30(17(3)4)24(32)21-10-9-19-18-8-11-22-27(6,15-13-23(31)29(22)7)20(18)12-14-26(19,21)5/h16-22h,8-15h2,1-7h3,(h,28,33)/t18-,19-,20-,21+,22+,26-,27+/m0/s1key:wmpqmbuxzhmefz-yjpjvvpasa-n