Levosimendan Impurity 2 (Mixture ofZandEIsomers) Levosimendan Impurity 1 diethyl 2-(1-(4-acetaMidophenyl)-1-oxopropan-2-yl)Malonate 3(2H)-Pyridazinone, 4,5-dihydro-5-methyl-6-phenyl-, (5R)- (R)-N-Acetyl-6-(4-aminophenyl)-4,5-dihydro-5-methyl-3(2H)-pyridazinone Levosimendan Impurity 14 Levothyroxine Impurity 16 Levothyroxine EP Impurity B Levothyroxine Related Compound (2-Acetamido-3-(4-acetoxy-3,5-diiodophenyl)propanoic Acid) 3-Iodo-DL-tyrosine 3,5-DIIODOTHYROACETIC ACID Levothyroxine Impurity Levosimendan Impurity 8 Levothyroxine Impurity 16 3,3',5-TRIIODOTHYROPROPIONIC ACID Levothyroxine Related Compound (2-Acetamido-3-(3,5-diiodo-4-(4-methoxyphenoxy)phenyl) Propanoic Acid) Levothyroxine Impurity Levothyroxine Impurity 54