67-30-1丨Levothyroxine Impurity 4（Levothyroxine EP Impurity D）...

51-24-1丨Levothyroxine Impurity 3（Levothyroxine EP Impurity C）...

6893-02-3丨Levothyroxine Impurity 1（Levothyroxine EP Impurity A）...

55-03-8丨Levothyroxine Sodium...

76838-72-7丨Iguratimod Impurity 3...