The molecule is an iodothyronine having iodo substituents in the 3-, 3'-, 5- and 5'-positions and a sulfate group attached to the phenol function. It derives from a thyroxine. It is a conjugate acid of a thyroxine sulfate(1-).
2-amino-3-[4-(3,5-diiodo-4-sulfooxyphenoxy)-3,5-diiodophenyl]propanoic acid