| http://www.w3.org/ns/prov#value | - The activated PEG obtained by reaction with carboxydiimide may thus be represented by the following general formula I: ##STR1## it being possible for R to be especially either a hydrogen atom, a C1 -C6 alkyl radical or a carboxyimidazole group, n being between about 45 and about 2,400.
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