, R<7>, R<8> and R<9> independently are hydrogen; alkyl; halogen; NH2, NO2, CN, CF3, SO2NY'-Y", COZ' wherein Z' is NY'Y" or alkyl and Y' and Y" independently are hydrogen or alkyl; triazolyl; imidazolyl, piperidino, piperazinyl, morpholino or thiomorpholino all rings optionally being subtituted, are useful in the treatment of indications caused by hyperactivity of the excitatory neurotransmitters.">
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