2,4,6-Triiodo-3-(N-methylcarbamoyl)-5-(N-methylacetylamino)benzoic Acid, 2,4,6-Triiod-3-(N-methylcarbamoyl)-5-(N-alkyl-N-acetylamino)-benzoesaeure, 2.4.6-Triiodo-5-(N-methylacetamido)-N-methylisophthalamic acid, 2,4,6-Triiodo-3-methylcarbamyl-5-N-acetyl-N-methylamino-benzoic acid,