| http://www.w3.org/ns/prov#value | - R represents a polysaccharide remnant such as for example a dextran, starch, cellulose or agarose remnant, n is a whole number from 1 to 10 and preferably 2 to 5, R1 and R2, identical or different, represent an inferior alkyl or hydroxyalkyl radical, for example the following radicals:
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