| http://www.w3.org/ns/prov#value | - The material according to claim 12, wherein R1 is a stable linking group which is a member selected from the group consisting of alkyl, substituted alkyl, aryl, arylalkyl, substituted aryl, substituted arylalkyl, saturated cyclic hydrocarbon, unsaturated cyclic hydrocarbon, heteroaryl, heteroarylalkyl, substituted heteroaryl, substituted heteroarylalkyl, hetcrocyclic, substituted heterocyclic and
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