SMILES: C1=C(C=C(C(=C1I)OC2=CC(=C(C(=C2)I)O)I)I)CC(C(=O)[O-])[NH3+]
Description: The molecule is the amino acid zwitterion formed from thyroxine by transfer of a proton from the carboxy group to the amino group. Major species at pH 7.3. It is a tautomer of a thyroxine.