cloxotestosterone acetate cloxotestosterone acetate cloxotestosterone acetate (inn; brand name caprosem), also known as testosterone 17β-chloral hemiacetal o-acetate, is a synthetic, injected anabolic–androgenic steroid (aas) and an androgen ether and ester – specifically, the o-acetate ester of cloxotestosterone, the 17β-trichloro hemiacetal ether of testosterone. it is administered via intramuscular injection as a 100 mg, 2 ml aqueous suspension and lasts 4 to 6 weeks with a single administration. the drug was first marketed in the early 1960s. cloxotestosterone acetateclinical datatrade namescaprosemother namestestosterone 17β-chloral hemiacetal o-acetate; 17β-(1-(acetyloxy)-2,2,2-trichloroethoxy)androst-4-en-3-oneroutes ofadministrationintramuscular injectionidentifiers iupac name phenanthren-17-yl]oxy]ethyl] acetate cas number13867-82-8pubchem cid20056698chemspider16739648unii2x9yip66zochemical and physical dataformulac23h31cl3o4molar mass477.85 g·mol−13d model (jsmol)interactive image smiles cc(=o)oc(c(cl)(cl)cl)o1cc21(cc32ccc4=cc(=o)cc34c)c inchi inchi=1s/c23h31cl3o4/c1-13(27)29-20(23(24,25)26)30-19-7-6-17-16-5-4-14-12-15(28)8-10-21(14,2)18(16)9-11-22(17,19)3/h12,16-20h,4-11h2,1-3h3/t16-,17-,18-,19-,20?,21-,22-/m0/s1key:sjwgveplfjgwnb-uwsxkfmvsa-n