eneral, halogen as a substituent preferably denotes fluorine, chlorine, bromine and iodine, in particular fluorine, chlorine and bromine, and particularly preferably fluorine and chlorine.Unsubstituted or substituted cycloalkyl as a substituent represents cycloalkyl, preferably having 3 to 8, in particular 3, 5 or 6 carbon atoms.Examples which may be mentioned are optionally substituted cyclopropy