selepressin selepressin selepressin (inn) (code name fe-202158), also known as vasopressin) is a potent, highly selective, short-acting peptide full agonist of the vasopressin 1a receptor and analog of vasopressin which was under development by ferring pharmaceuticals for the treatment of vasodilatory hypotension in septic shock. selepressinclinical dataother namesh-cys(1)-phe-ile-hgln-asn-cys(1)-pro-orn(ipr)-gly-nh2atc codenoneidentifiers iupac name (2s)-1--6,9,12,15,18-pentaoxo-1,2-dithia-5,8,11,14,17-pentazacycloicosane-4-carbonyl]-n--1-oxo-5-(propan-2-ylamino)pentan-2-yl]pyrrolidine-2-carboxamide cas number876296-47-8pubchem cid53330936chemspider26609297unii8p2t76m0sjchemblchembl1817709comptox dashboard (epa)dtxsid90236538 chemical and physical dataformulac46h73n13o11s2molar mass1048.29 g·mol−13d model (jsmol)interactive image smiles cc(c)1c(=o)n(c(=o)n(c(=o)n(cssc(c(=o)n(c(=o)n1)cc2ccccc2)n)c(=o)n3ccc3c(=o)n(cccnc(c)c)c(=o)ncc(=o)n)cc(=o)n)cccc(=o)n inchi inchi=1s/c46h73n13o11s2/c1-5-26(4)38-45(69)54-30(14-9-17-35(48)60)41(65)56-32(21-36(49)61)42(66)57-33(24-72-71-23-28(47)39(63)55-31(43(67)58-38)20-27-12-7-6-8-13-27)46(70)59-19-11-16-34(59)44(68)53-29(15-10-18-51-25(2)3)40(64)52-22-37(50)62/h6-8,12-13,25-26,28-34,38,51h,5,9-11,14-24,47h2,1-4h3,(h2,48,60)(h2,49,61)(h2,50,62)(h,52,64)(h,53,68)(h,54,69)(h,55,63)(h,56,65)(h,57,66)(h,58,67)/t26-,28-,29-,30-,31-,32-,33-,34-,38-/m0/s1key:jcvqbjtwwdyufq-mrutuvjxsa-n the phase 2b/3 adaptive trial (sepsis-act) was terminated in february 2018 for futility. the trial was halted prior to the initiation of the arm for the highest dosing regimen of 5.0 ng/kg/min.