O-(4-Hydroxy-3,5-diiodophenyl)-3,5-diiodo-DL-tyrosine Oroxine Ro-thyroxine Roxstan Sodium l-thyroxin Sodium L-thyroxine Sodium levothyroxine Sodium O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-DL-tyrosinate Sodium thyroxin Sodium thyroxinate Sodium thyroxine Sodium-L-thyroxine synthroid Synthroid...