Levothyroxine, THYROXINE, thyroxine-binding globulin, L-Tyrosine, O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-, 3,3’,5,5‘’-Tetraiodo-L-thyronine, l-t4, Thyrax, thx, thyroxinal, L-3,5,3',5'-tetraiodothyronine, 3,5,3',5'-tetraiodothyronine, tetraiodothyronine, L-THYROXIN, thyroxin, Henning, L-Thyroxine, 3-[4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]-L-alanine