| http://www.w3.org/ns/prov#value | - is chosen from a hydrogen atom, a halogen atom, such as a chlorine atom, C1-C4 alkyl radicals, a sulpho radical, a carboxy radical, C1-C4 monohydroxyalkyl radicals, C1-C4 hydroxyalkoxy radicals, acetylamino(C1-C4)alkoxy radicals, mesylamino(C1-C4)alkoxy radicals, and carbamoylamino(C1-C4)alkoxy radicals; and [0057] R4 is chosen from a hydrogen atom, a halogen atom, and C1-C4 alkyl radicals. [0058]
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