pendetide pendetide pendetide (gyk-dtpa) is a chelating agent. it consists of pentetic acid (dtpa) linked to the tripeptide glycine (g) – l-tyrosine (y) – l-lysine (k). pendetide names iupac name n6-ethyl](carboxymethyl)amino]ethyl]-n-(carboxymethyl)glycyl]-n2-(n-glycyl-l-tyrosyl)-l-lysine identifiers cas number 148805-91-8 y 3d model (jsmol) interactive image chemspider 16737038 n pubchem cid 66648912 unii 60c8d1c9uj y comptox dashboard (epa) dtxsid60164112 inchi inchi=1s/c31h47n7o14/c32-14-24(40)34-23(13-20-4-6-21(39)7-5-20)30(50)35-22(31(51)52)3-1-2-8-33-25(41)15-37(17-27(44)45)11-9-36(16-26(42)43)10-12-38(18-28(46)47)19-29(48)49/h4-7,22-23,39h,1-3,8-19,32h2,(h,33,41)(h,34,40)(h,35,50)(h,42,43)(h,44,45)(h,46,47)(h,48,49)(h,51,52)/t22-,23-/m0/s1 nkey: zmewrpbaqvsbbb-gotsbhomsa-n ninchi=1/c31h47n7o14/c32-14-24(40)34-23(13-20-4-6-21(39)7-5-20)30(50)35-22(31(51)52)3-1-2-8-33-25(41)15-37(17-27(44)45)11-9-36(16-26(42)43)10-12-38(18-28(46)47)19-29(48)49/h4-7,22-23,39h,1-3,8-19,32h2,(h,33,41)(h,34,40)(h,35,50)(h,42,43)(h,44,45)(h,46,47)(h,48,49)(h,51,52)/t22-,23-/m0/s1key: zmewrpbaqvsbbb-gotsbhombd smiles c1cc(ccc1cc(c(=o)nc(ccccnc(=o)cn(ccn(ccn(cc(=o)o)cc(=o)o)cc(=o)o)cc(=o)o)c(=o)o)nc(=o)cn)o properties chemical formula c31h47n7o14 molar mass 741.318 g/mol except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). n verify (what is yn ?) infobox references use the following monoclonal antibodies are linked to pendetide to chelate a radionuclide, indium-111. the antibodies selectively bind to certain tumour cells, and the radioactivity is then used for imaging of the tumours. indium (111in) capromab pendetide (prostate cancer) indium (111in) satumomab pendetide (other cancer types)