1-(4-(((2-Carboxybutyl)amino)carbonyl)-2,3,5,6-tetraiodobenzoyl)proline 29820-40-4 BRN 0504482 Proline, 1-(4-(((2-carboxybutyl)amino)carbonyl)-2,3,5,6-tetraiodobenzoyl)- alpha-(4-(2-Carboxy-pyrrolidino)-carbonyl-2,3,5,6-tetrajod-benzoyl-amidomethyl)-buttersaure