| http://www.w3.org/ns/prov#value | - wherein X is an electron withdrawing radical, M is a metal which may be selected from the periodic table of either an alkali metal or an alkaline earth metal, R' is an aryl radical of 1-2 aromatic rings, R is an aliphatic, cycloaliphatic, olefinic or cycloolefinic radical of 1-10 carbon atoms, n and m are integers of 0-11, s is an integer of 0-5 and p is an integer of 1-4.
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