| http://www.w3.org/ns/prov#value | - In other embodiments of the present invention R3 is selected from H, hydroxy, alkyl especially C1-C10 alkyl groups, C1-C6 alkyl, e.g. C1-C3 alkyl group, methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, n-pentyl and other pentyl isomers, and n-hexyl and other hexyl isomers, alkoxy especially C1-C10 alkoxy groups, C1-C6 alkoxy, e.g. C1-C3 alkoxy group, methoxy, ethoxy, propoxy etc
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