| http://www.w3.org/ns/prov#value | - oxy, amino, nitro or trifluoromethyl group, R' is a hydrogen atom, an alkyl group optionally mono- or polysubstituted with a halogen atom or a trifluoromethyl group, a C1-4 aralkyl group optionally mono- or polysubstituted on the aryl nucleus with a radical selected from a halogen atom, a hydroxy, amino, nitro or trifluoromethyl group; a mono- or disubstituted carbamoyl group of formula ##STR5##
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