clostebol acetate clostebol acetate clostebol acetate (ban) (brand names macrobin, steranabol, alfa-trofodermin, megagrisevit), also known as 4-chlorotestosterone 17β-acetate (4-clta) or as 4-chloroandrost-4-en-17β-ol-3-one 17β-acetate, is a synthetic, injected anabolic-androgenic steroid (aas) and a derivative of testosterone that is marketed in germany and italy. it is an androgen ester – specifically, the c17β acetate ester of clostebol (4-chlorotestosterone) – and acts as a prodrug of clostebol in the body. clostebol acetate is administered via intramuscular injection. clostebol acetateclinical datatrade namesmacrobin, steranabol, alfa-trofodermin, megagrisevitother names4-chlorotestosterone acetate; 4-clta; 4-chloroandrost-4-en-17β-ol-3-one 17β-acetate; nsc-72159routes ofadministrationintramuscular injectionidentifiers iupac name phenanthren-17-yl] acetate cas number855-19-6pubchem cid13327drugbankdb15984chemspider12762unii780zzx4p14keggc18374chebichebi:81712chemblchembl519327comptox dashboard (epa)dtxsid00234702 echa infocard100.011.565 chemical and physical dataformulac21h29clo3molar mass364.91 g·mol−13d model (jsmol)interactive image smiles cc(=o)o1cc21(cc32ccc4=c(c(=o)cc34c)cl)c inchi inchi=1s/c21h29clo3/c1-12(23)25-18-7-6-14-13-4-5-16-19(22)17(24)9-11-20(16,2)15(13)8-10-21(14,18)3/h13-15,18h,4-11h2,1-3h3/t13-,14-,15-,18-,20+,21-/m0/s1key:xygmefjskqebto-kujxmbtlsa-n