nandrolone undecanoate nandrolone undecanoate nandrolone undecanoate (nu), also known as nandrolone undecylate, and sold under the brand names dynabolon, dynabolin, and psychobolan, is an androgen and anabolic steroid medication and a nandrolone ester. it was developed in the 1960s, and was previously marketed in france, germany, italy, and monaco, but has since been discontinued and is now no longer known to be available. the pharmacokinetics of nandrolone undecanoate alone (dynabolon) and in combination with other steroid esters (trophobolene) have been studied and compared. relative affinities (%) of nandrolone and related steroids compoundprarergrmrshbgcbg nandrolone20154–155<0.10.51.61–160.1 testosterone1.0–1.2100<0.10.170.919–823–8 estradiol2.67.91000.60.138.7–12<0.1 notes: values are percentages (%). reference ligands (100%) were progesterone for the pr, testosterone for the ar, estradiol for the er, dexamethasone for the gr, aldosterone for the mr, dihydrotestosterone for shbg, and cortisol for cbg. sources: see template. nandrolone undecanoateclinical datatrade namesdynabolon, dynabolin, psychobolanother namesnu; nandrolone undecylate; 19-nortestosterone 17β-undecanoateroutes ofadministrationintramuscular injectiondrug classandrogen; anabolic steroid; androgen ester; progestogenidentifiers iupac name phenanthren-17-yl] undecanoate cas number862-89-5pubchem cid94193chemspider23089252uniik64mcf1i9zcomptox dashboard (epa)dtxsid701006644 echa infocard100.011.573 chemical and physical dataformulac29h46o3molar mass442.684 g·mol−13d model (jsmol)interactive image smiles ccccccccccc(=o)o1cc21(cc32ccc4=cc(=o)cc34)c inchi inchi=1s/c29h46o3/c1-3-4-5-6-7-8-9-10-11-28(31)32-27-17-16-26-25-14-12-21-20-22(30)13-15-23(21)24(25)18-19-29(26,27)2/h20,23-27h,3-19h2,1-2h3/t23-,24+,25+,26-,27-,29-/m0/s1key:graawegturlykp-mvtmsodmsa-n