| http://www.w3.org/ns/prov#value | - The alkyl and aryl groups of R are the same as defined hereinbefore.More preferably, the linking group is an alkylene group containing 10 or less carbon atoms, an alkenylene group containing 10 or less carbon atoms, an alkynylene group containing 10 or less carbon atoms, an arylene group containing from 6 to 10carbon atoms, --S--, --SO--, --SO.sub.2-- or a combination thereof (e.g., --SCH.sub.2CH.
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