nisterime nisterime nisterime (inn), also known as 2α-chloro-4,5α-dihydrotestosterone 3-o-(p-nitrophenyl)oxime or as 2α-chloro-5α-androstan-17β-ol-3-one 3-o-(p-nitrophenyl)oxime, is a synthetic anabolic-androgenic steroid (aas) and a derivative of dihydrotestosterone (dht) that was never marketed. the c17α acetate ester of nisterime, nisterime acetate (orf-9326), also exists and was developed as a postcoital contraceptive but was similarly never marketed. nisterimeclinical dataother names2α-chloro-5α-androstan-17β-ol-3-one 3-o-(p-nitrophenyl)oxime; 2α-chloro-4,5α-dihydrotestosterone 3-o-(p-nitrophenyl)oxime; 2α-chloro-3-(p-nitrophenoxy)imino-5α-androstan-17β-olidentifiers iupac name (2r,3e,5s,8r,9s,10s,13s,14s,17s)-2-chloro-10,13-dimethyl-3-(4-nitrophenoxy)imino-1,2,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydrocyclopentaphenanthren-17-ol cas number51354-32-6pubchem cid5361123chemspider4514747uniiabf7s9u8w6chemical and physical dataformulac25h33cln2o4molar mass461.00 g·mol−13d model (jsmol)interactive image smiles c12cc3(1cc2o)cc43(c(/c(=n/oc5=cc=c(c=c5)(=o))/c4)cl)c inchi inchi=1s/c25h33cln2o4/c1-24-12-11-20-18(19(24)9-10-23(24)29)8-3-15-13-22(21(26)14-25(15,20)2)27-32-17-6-4-16(5-7-17)28(30)31/h4-7,15,18-21,23,29h,3,8-14h2,1-2h3/b27-22+/t15-,18-,19-,20-,21+,23-,24-,25-/m0/s1key:fssasqyidsghst-bwyvwvftsa-n