| prov:value
| - In particular, X can be selected from moieties such as O, N(R12), S, SO and SO2 where R12 is the same as that defined for R1, i.e. H, C1-6 alkyls, branched alkyls, aryls, substituted aryls, C1-6 alkyl aralkyls, heteroalkyls, substituted heteroalkyls or substituted C1-6 alkyls such as carboxyalkyls, aminoalkyls, dialkylaminos, hydroxyalkyls or mercaptoalkyls, to name but a few.
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