3-(Acetylamino)-5-(diacetylamino)-2,4,6-triiodobenzoic acid (as per EP);3-(Acetylamino)-5-(diacetylamino)-2,4,6-triiodobenzoic Acid ; 3-Acetamido-5-(N-acetylacetamido)-2,4,6-triiodobenzoic Acid;