5.5 - (1,3 - propandiil) bis (imino (2 - bone - 2.1 - etandiil) acetilimino) - bis (1,3,5-tris - 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.