The molecule is an iodothyronine compound having iodo substituents at the 3-, 3'-, 5- and 5'-positions. It has a role as a mitogen. It is an iodothyronine, a 2-halophenol, an iodophenol, a tyrosine derivative and a non-proteinogenic alpha-amino acid. It is a tautomer of a thyroxine zwitterion.
2-amino-3-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]propanoic acid