| http://www.w3.org/ns/prov#value | - stituted, or of polycarboxylic acids of formula R.sub.9 (COOH).sub.n, in which R.sub.9 represents an alkylene radical having from 1 to 10 carbon atoms and n is an integer greater than or equal to 2, or R.sub.9 can be a single bondand then n has the value 2.
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