FIELD: chemistry.
SUBSTANCE: invention relates to a pegylation agent containing an aromatic diazo group and having the following general formula: 
, where X is O or NH; n is a whole number from 455 to 1140.
EFFECT: obtaining a novel pegylation agent which binds with polypeptides via an azo group, resulting in formation of a covalent conjugate which absorbs in the visible and near UV region of the electronic spectrum.
3 dwg
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