The present invention provides compounds of the formula (I)
wherein R 6 is chlorine, bromine, iodine, C 1-4 alkyl or trifluoromethyl; R 7 is hydrogen, halogen, C 1-4 alkyl or trifluoromethyl or R 6 and R 7 form a -CH= CH -CH=CH- group optionally substituted by a halogen atom or a C 1-4 alkyl or trifluoromethyl group; R 8 is hydrogen, halogen, C 1-4 alkyl or trifluoromethyl; R 9 is hydrogen, halogen, C 1-4 alkyl or trifluoromethyl, and R 10 is hydrogen, methyl or fluorine, provided that at most only two of R 7 -R 10 are other than hydrogen and that R 7 -R 10 are not all hydrogen when R 6 is chlorine, which are useful as intermediates for the preparation of compounds of formula (II)
wherein R 6 , R 7 , R e , R 9 and R 10 are as defined in claim 1 and R" is amino, C 1-4 acylamino or di-substituted aminomethyleneamino, being useful in the treatment of CNS disorders such epilepsy.