thymopentin thymopentin thymopentin is an immunostimulant. as such, it has been used in several clinical studies in the early years of the aids pandemic (from 1983 to 1985). thymopentin helped to improve immunological condition in several patients for a brief time under specific treatments. thymopentinclinical dataother namesl-arginyl-l-lysyl-l-α-aspartyl-l-valyl-l-tyrosineatc codel03ax09 (who) identifiers iupac name (3s)-3-amino]hexanoyl]amino]-4-amino]-3-methyl-1-oxobutan-2-yl]amino]-4-oxobutanoic acid cas number69558-55-0 ypubchem cid451417chemspider397640 yuniio3y80zf13fkeggd06117 ychemblchembl156025 yniaid chemdb000127comptox dashboard (epa)dtxsid9046609 echa infocard100.242.320 chemical and physical dataformulac30h49n9o9molar mass679.776 g·mol−13d model (jsmol)interactive image smiles o=c(n(c(=o)n(c(=o)n(c(=o)n(c(=o)o)cc1ccc(o)cc1)c(c)c)cc(=o)o)ccccn)(n)ccc/n=c(\n)n inchi inchi=1s/c30h49n9o9/c1-16(2)24(28(46)38-22(29(47)48)14-17-8-10-18(40)11-9-17)39-27(45)21(15-23(41)42)37-26(44)20(7-3-4-12-31)36-25(43)19(32)6-5-13-35-30(33)34/h8-11,16,19-22,24,40h,3-7,12-15,31-32h2,1-2h3,(h,36,43)(h,37,44)(h,38,46)(h,39,45)(h,41,42)(h,47,48)(h4,33,34,35)/t19-,20-,21-,22-,24-/m0/s1 ykey:pswffkravbdqeg-ygqnsocvsa-n y (verify) it interacts with t cells. it is a thymic polypeptide.