| http://www.w3.org/ns/prov#value | - aromatic, or cyclic hydrocarbon radical substituted with one or more of said functional groups; where R is hydrogen; branched or unbranched C1 -C20 unsubstituted or substituted alkyl, alkenyl or alkynyl; unsubstituted or substituted aryl; unsubstituted or substituted heteroaryl; unsubstituted or substituted alkylaryl; unsubstituted or substituted arylalkyl or arylene; wherein k is an integer from
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