5, 5 '- (1, 3) - propandiil) bis (imino (2 - bone - 2, 1) - etandiil) acetilimino) - bis (2, 4, 6 - triiodo - 1, 3 - benzendicarbossiamidi)their method of preparation and contrast media roentgenografici containing them

摘要

the compounds of formula i (where r1, r2 in the formula), r3, r 1, r2, r 3 have the meanings given in claim 1, are useful as contrast media roentgenografici.