英文别名3,5,3',5'-Tetraiodo Thyroacetamide; Levothyroxine Acetamide Impurity; Levothyroxine Related Compound 4; Levothyroxine T4-Acetamide Impurity; Benzeneacetamide, 4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodo-; T4-acetamide; 3,3',5,5'-Tetraiodothyroacetamide