| http://www.w3.org/ns/prov#value | - more preferably 2 to 10 carbon atoms, such as vinyl, allyl, 2-butenyl and 3-pentenyl); an alkynyl group (preferably having 2 to 30 carbon atoms, more preferably 2 to 20 carbon atoms and still more preferably 2 to 10 carbon atoms, such as propargyl and 3-pentenyl); an aryl group (preferably having 6 to 30 carbon atoms, more preferably 6 to 20 carbon atoms and still more preferably 6 to 12 carbon at
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