Compositions of iodophenyl esters and iodophenyl sulfonates and cellulose derivatives for visualization of the gastrointestinal tract

摘要

Disclosed are contrast agents of the formula <IMAGE> wherein <IMAGE> Z is H, halo, C5-C20 alkyl, cycloalkyl, lower alkoxy, cyano, where the alkyl and cycloalkyl groups can be substituted with halogen or halo-lower-alkyl groups; R is C1-C25 alkyl, cycloalkyl, aryl or halo-lower-alkyl, each of which may be optionally substituted with lower-alkoxy, hydroxy, carboxy or lower-alkoxy carbonyl, lower-alkenyl, lower-alkynyl, lower-alkylene or lower-alkoxy-carbonyloxy; n is 1-5; y is 0-4; and w is 1-4; in a pharmaceutically acceptable carrier comprising a cellulose derivative.