| http://www.w3.org/ns/prov#value | - o 12 carbon atoms, such as phenyl, p-methylphenyl or naphthyl), a substituted carbonyl group (preferably having 1 to 20 carbon atoms, still preferably 1 to 16 carbon atoms, and particularly preferably 1 to 12 carbon atoms, such as acetyl, benzoyl, methoxycarbonyl, phenyloxycarbonyl, dimethylaminocarbonyl or phenylaminocarbonyl), a substituted sulfonyl group (preferably having 1 to 20 carbon atoms,
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