The molecule is the alpha-amino-acid anion resulting from the removal of the proton from the carboxylic acid group of L-thyroxine. It is a monocarboxylic acid anion and an alpha-amino-acid anion. It is a conjugate base of a L-thyroxine.
(2S)-2-amino-3-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]propanoate