英文别名Levothyroxine Impurity 27; (S)-Ethyl 2-acetamido-3-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl)propanoate; ethyl (2R)-2-acetamido-3-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]propanoate; N-Acetyl-(S)-thyroxine Ethyl Ester; N-Acetyl-O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-L-tyrosine Ethyl Ester; Levothyroxine Impurity 45; L-Tyrosine, N-acetyl-O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-, ethyl ester; Levothyroxine ethyl ester N-Acetyl impurity; Left thyroxine sodium intermediate 2 
