FIELD: medicine. SUBSTANCE: described are new dendrimeric polymers of general formula I: A-(X)b (1), wherein A, X and b are as defined in claim 1. They are useful as X- ray diagnostic agents. Also described are method of preparing thereof and diagnostic agent for X-ray diagnostics. X-ray contrast compounds are intended for identification and localization of cardiovascular diseases, they are easily tolerated, highly efficient and have longer half life. EFFECT: improved properties of the title polymers. 13 cl, 19 ex, 2 dwg
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