++++ Agriculture - Common organization of the markets - Cereals - Production refunds - Exclusion of products intended for the manufacture of isoglucose - Scope and limits - Discrimination between producers or consumers - Distinction between the foodstuffs sector and the chemicals sector - Grant in the case of isoglucose used for the manufacture of sorbitol ( EEC Treaty, Art . 40(3 ), second subparagraph; Council Regulation No 2742/75, as amended by Regulation No 1665/77, Art . 5a )