| http://www.w3.org/ns/prov#value | - l or aryl, and A is a bridge selected from the group consisting of a direct bond, methylene, methylene mono- or disubstituted with alkyl and/or aryl, a five or six membered cycloalkylene, sulfonyl, thio, oxy, carbonyl, xylylene optionally substituted by alkyl at one or both methylene carbon atoms and phenylene. 2.
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