merotocin merotocin merotocin (inn) (developmental code name fe-202767), also known as carba-1-(4-fbzlgly7)dot, is a peptidic agonist of the oxytocin receptor that was derived from oxytocin. it is under development by ferring pharmaceuticals for the treatment of preterm mothers with lactation failure requiring lactation support, and is in phase ii clinical trials for this indication. merotocin is potent (ec50 < 0.1 nm) and highly selective (>1000-fold over the related vasopressin receptors). merotocinclinical dataother namesn-(4-sulfanylbutanoyl)-l-tyrosyl-l-isoleucyl-l-glutaminyl-l-asparaginyl-l-cysteinyl-n-glycyl-l-leucylglycinamide cyclic (1-5)-thioetheratc codenoneidentifiers iupac name (3r,6s,9s,12s,15s)-6-(2-amino-2-oxoethyl)-n--4-methyl-1-oxopentan-2-yl]amino]-2-oxoethyl]-9-(3-amino-3-oxopropyl)-12--n--15--5,8,11,14,17-pentaoxo-1-thia-4,7,10,13,16-pentazacycloicosane-3-carboxamide cas number1190083-57-8pubchem cid76073634chemspider34994563uniiuw3on116cochemical and physical dataformulac48h68fn11o12smolar mass1042.20 g·mol−13d model (jsmol)interactive image smiles cc(c)1c(=o)n(c(=o)n(c(=o)n(cscccc(=o)n(c(=o)n1)cc2ccc(cc2)o)c(=o)n(cc3ccc(cc3)f)cc(=o)n(cc(c)c)c(=o)ncc(=o)n)cc(=o)n)ccc(=o)n inchi inchi=1s/c48h68fn11o12s/c1-5-27(4)42-47(71)56-32(16-17-37(50)62)44(68)57-35(21-38(51)63)45(69)58-36(25-73-18-6-7-40(65)54-34(46(70)59-42)20-28-10-14-31(61)15-11-28)48(72)60(23-29-8-12-30(49)13-9-29)24-41(66)55-33(19-26(2)3)43(67)53-22-39(52)64/h8-15,26-27,32-36,42,61h,5-7,16-25h2,1-4h3,(h2,50,62)(h2,51,63)(h2,52,64)(h,53,67)(h,54,65)(h,55,66)(h,56,71)(h,57,68)(h,58,69)(h,59,70)/t27-,32-,33-,34-,35-,36-,42-/m0/s1key:pvvhqwismvjhfk-nifjbhdksa-n