Synonyms: Alanine,3-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]-, monosodium salt,pentahydrate, L- (8CI); L-Tyrosine, O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-,monosodium salt, pentahydrate (9CI); 3',3,5',5-Tetraiodo-L-thyronine sodiumsalt pentahydrate; Sodium levothyroxine pentahydrate