clostebol caproate clostebol caproate clostebol caproate (brand name macrobin-depot), also known as clostebol hexanoate or chlorotestosterone caproate (jan), as well as 4-chlorotestosterone 17β-caproate or as 4-chloroandrost-4-en-17β-ol-3-one 17β-caproate, is a synthetic, injected anabolic-androgenic steroid (aas) and a derivative of testosterone. it is an androgen ester – specifically, the c17β caproate ester of clostebol (4-chlorotestosterone) – and acts as a prodrug of clostebol in the body. clostebol acetate is administered via intramuscular injection. clostebol caproateclinical datatrade namesmacrobin-depotroutes ofadministrationintramuscular injectionidentifiers iupac name (1s,2r,10r,11s,14s,15s)-6-chloro-2,15-dimethyl-5-oxotetracycloheptadec-6-en-14-yl hexanoate cas number32361-10-7chemspider8246328unii300383e96achemical and physical dataformulac25h37clo3molar mass421.02 g·mol−13d model (jsmol)interactive image smiles cccccc(=o)o1cc23ccc4=c(cl)c(=o)cc4(c)3cc12c inchi inchi=1s/c25h37clo3/c1-4-5-6-7-22(28)29-21-11-10-17-16-8-9-19-23(26)20(27)13-15-24(19,2)18(16)12-14-25(17,21)3/h16-18,21h,4-15h2,1-3h3/t16-,17-,18-,21-,24?,25?/m0/s1key:omnunhqdarklsm-vpkdwvktsa-n