| http://www.w3.org/ns/prov#value | - bly 6 to 12 carbon atoms, such as phenyl, p-methylphenyl, naphthyl and anthranyl); an acyl group (preferably having 1 to 30 carbon atoms, more preferably 1 to 20 carbon atoms, and still more preferably 1 to 12 carbon atoms, such as acetyl, benzoyl, formyl and pivaloyl); an alkoxycarbonyl group (preferably having 2 to 30 carbon atoms, more preferably 2 to 20 carbon atoms, and still more preferably
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