testosterone valerate testosterone valerate testosterone valerate, or testosterone pentanoate, also known as androst-4-en-17β-ol-3-one 17β-valerate, is a synthetic, steroidal androgen and an androgen ester – specifically, the c17β valerate ester of testosterone – which is used in veterinary medicine. it is administered via intramuscular injection and acts as a long-lasting prodrug of testosterone. the medication is available as a component of the veterinary drug deposterona, which is marketed in mexico and also contains testosterone acetate and testosterone undecanoate. testosterone valerate is a short-to-medium duration ester of testosterone, with an elimination half-life of approximately twice that of the short-acting testosterone propionate. testosterone valerateclinical datatrade namesdeposteronaother namestestosterone pentanoate; testosterone 17β-valerate; androst-4-en-17β-ol-3-one 17β-valerateroutes ofadministrationintramuscular injectionidentifiers iupac name phenanthren-17-yl] pentanoate cas number3129-43-9pubchem cid102373chemspider92468unii7sf23403a0comptox dashboard (epa)dtxsid40185204 echa infocard100.019.559 chemical and physical dataformulac24h36o3molar mass372.549 g·mol−13d model (jsmol)interactive image smiles ccccc(=o)o1cc21(cc32ccc4=cc(=o)cc34c)c inchi inchi=1s/c24h36o3/c1-4-5-6-22(26)27-21-10-9-19-18-8-7-16-15-17(25)11-13-23(16,2)20(18)12-14-24(19,21)3/h15,18-21h,4-14h2,1-3h3/t18-,19-,20-,21-,23-,24-/m0/s1key:ucnqpyvhdchenm-cgrizkaysa-n