norclostebol acetate norclostebol acetate norclostebol acetate (brand name anabol 4-19), or norchlorotestosterone acetate (nclta), also known as 4-chloro-19-nortestosterone 17β-acetate or as 4-chloroestr-4-en-17β-ol-3-one, is a synthetic, injectable anabolic-androgenic steroid (aas) and derivative of 19-nortestosterone (nandrolone). it is an androgen ester – specifically, the c17β acetate ester of norclostebol (4-chloro-19-nortestosterone). norclostebol acetateclinical datatrade namesanabol 4-19routes ofadministrationintramuscular injectionidentifiers iupac name phenanthren-17-yl] acetate cas number1164-99-4pubchem cid101730066chemspider91682uniijkp2s7674achemical and physical dataformulac20h27clo3molar mass350.88 g·mol−13d model (jsmol)interactive image smiles cc(=o)oc1cc21(cc32ccc4=c(c(=o)cc34)cl)c inchi inchi=1s/c20h27clo3/c1-11(22)24-18-8-6-16-14-3-4-15-12(5-7-17(23)19(15)21)13(14)9-10-20(16,18)2/h12-14,16,18h,3-10h2,1-2h3/t12-,13-,14-,16+,18?,20+/m1/s1key:fnmafgqvncrkgs-fomdfygasa-n