The molecule is a tripeptide consisting of three tyrosine residues each of which is substituted at the 3- and 5-positions by iodine. It is a tripeptide and an organoiodine compound.
2-[[2-[[2-amino-3-(4-hydroxy-3,5-diiodophenyl)propanoyl]amino]-3-(4-hydroxy-3,5-diiodophenyl)propanoyl]amino]-3-(4-hydroxy-3,5-diiodophenyl)propanoic acid