| http://www.w3.org/ns/prov#value | - Examples of substituents for the aromatic and heteroaromatic radicals are alkyl, alkenyl, alkoxy and alkylthio, and halo substituted derivatives thereof, especially those containing up to 20 carbon atoms, aryl, arylthio, especially phenyl and phenylthio, halogen, nitro, cyano, carboxyl, aralkyl, aryl- or alkyl-sulphonamido, aryl- or alkyl- sulphone, aryl- or alkyl-sulphoxide, hydroxy and primary,
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