L-Thyroxine

3,5,3,5'-tetraiodothyronine,beta-[(3,5-diodo-4-hydroxyphenoxy)-3,5-dliodopheny]alanine,1-3,5,3,5'-tetraiodothyronine;-t4;0-(4-hydroxy-3,5-dliodophenyl)-3,5-diiodo-tyrosin;o-(4-hydroxy-3,5-diiodophenyl)-3,5-
diiodotyrosine,;t4(hormone);tetraiodothyronine