| http://www.w3.org/ns/prov#value | - wherein each R is, for example, independently selected from the group consisting of hydrogen, alkyl with 1 to about 40 carbon atoms, alkoxy with 1 to about 40 carbon atoms, phenyl, substituted phenyl, higher aromatics such as naphthalene and anthracene, alkylphenyl with 6 to about 40 carbons, alkoxyphenyl with 6 to about 40 carbons, aryl with 6 to about 30 carbons, substituted aryl with 6 to about
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