Several companies integral to Iowa’s agricultural economy have been named as defendants in a lawsuit brought by three sugar producers who are upset by a new marketing pitch for high-fructose corn syrup that labels the product as “corn sugar.” Those companies named as defendants are Archer Daniels Midland Co. (ADM), Cargill Inc., Corn Products International Inc., Penford Products Co., Roquette America Inc., Tate & Lyle Ingredients Americas Inc. and the companies marketing and lobbying organization, the Corn Refiners Association Inc.