51-49-0 D-4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodobenzylalanine D-Thyroxine D-Tyrosine, O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo- Dextrothyroxine Dextrothyroxinum EINECS 200-102-7