Synonyms: Hydrocinnamicacid, a-ethyl-2,4,6-triiodo-3-(2-oxo-1-pyrrolidinyl)-(8CI); 2-Ethyl-3-[3-(2-oxo-1-pyrrolidinyl)-2,4,6-triiodophenyl]propionic acid;2-Ethyl-3-[3-(N-butrolactamyl)-2,4,6-triiodophenyl]propionic acid;2'-Ethyl-3-(2-oxopyrrolidinyl)-2,4,6-triiodo-3'-phenylpropionic acid; Iolidonicacid