| http://www.w3.org/ns/prov#value | - preferably 2-15 carbon atoms, such as a vinyl group, a 1-propenyl group, a 1-butene-2-yl group and a cyclohexene-1-yl group), an alkynyl group (preferably one having 2-30 carbon atoms, more preferably 2-15 carbon atoms, such as an ethynyl group and a 1-propynyl group), an aryl group (preferably one having 6-30 carbon atoms, more preferably 6-15 carbon atoms, such as a phenyl group, a tolyl group,
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