FIELD: chemistry.
SUBSTANCE: method involves reaction in aqueous medium of a diaquaplatinum or bis(nitrato)platinum complex in a mixture with dihalogenoplatinum with a block-copolymer of formula (1): 
or (2):
, where R1 represents hydrogen or C1-C12-alkyl, L1 and L2 - connecting groups, R3 - hydrogen, a protective group for amino groups, a hydrophobic or polymerised group, R4 represents hydroxy-, carboxy- or a hydrophobic group, R5 represents hydrogen, an alkali metal ion or a protective group for the carboxylic group, m=5-20000, n=10-60, under the condition that, R5 - hydrogen or an alkali metal ion constitutes 50% or more in n links.
EFFECT: obtaining a conjugate which does not contain silver ions, the solution of which has lower particle-size distribution.
17 cl, 11 dwg, 7 ex
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