| http://www.w3.org/ns/prov#value | - Suitable substituents are halogen, for example fluorine, chlorine and bromine, especially chlorine; alkyl radicals, in particular those with 1-4 C atoms, which can be monosubstituted by hydroxyl, C1 -C4 -alkoxy, cyano, carboxyl, C1 -C4 -alkoxycarbonyl, aminocarbonyl, chlorine or bromine, or trifluoromethyl; cycloalkyl radicals, such as cyclopentyl and cyclohexyl; aralkyl radicals, such as phenyl-C
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