prov:value
| - bers comprising identical or different heteroatoms from the series consisting of nitrogen, oxygen and sulfur, R7 is a hydrogen atom or a C1-C4-alkyl group, n is a number from 1 to 6, and o is 0 or 1; or X is a group of the formula (VI) in which R10, R12 and R13 are a hydrogen, fluorine, chlorine or bromine atom and R11 is a hydrogen, fluorine, chlorine or bromine atom or a nitro, C1-C5-alkyl, C1-C
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