prov:value
| - In the general formulae, X preferably represents halogen, C1 -C6 -alkyl or C1 -C6 -alkoxy, particularly preferably halogen, C1 -C4 -alkyl or C1 -C4 -alkoxy and very particularly preferably fluorine, chlorine, bromine, methyl, ethyl, n- and i-propyl, methoxy or ethoxy, and, in a particularly emphasised embodiment of the invention, methyl.
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