This invention provides compounds of the formulae: wherein: R.sub.1 is hydrogen, --C(O)CH.sub.3 or alkyl of 1-6 carbon atoms; R.sub.2 and R.sub.3 are each, independently, hydrogen, alkyl of 1-6 carbon atoms, cycloalkyl, alkoxy of 1-6 carbon atoms, --CH.sub.2OH, fluoroalkyl, alkyl sulfonamide of 1-6 carbon atoms, alkyl amide of 1-6 carbon atoms, amino, alkylamino of 1-6 carbon atoms, dialkylamino of 1-6 carbon atoms per alkyl moiety, fluoroalkoxy of 1-6 carbon atoms, acyl of 2-7 carbon atoms, aryl, or aroyl; R.sub.4 and R.sub.5 are each, independently, hydrogen, alkyl of 1-6 carbon atoms, alkoxy of 1-6 carbon atoms, halogen, fluoroalkyl, --CN, alkyl sulfonamide of 1-6 carbon atoms, alkyl amide of 1-6 carbon atoms, amino, alkylamino of 1-6 carbon atoms, dialkylamino of 1-6 carbon atoms per alkyl moiety, fluoroalkoxy of 1-6 carbon atoms, acyl of 2-7 carbon atoms, or aroyl; R.sub.6 and R.sub.7 are each independently hydrogen, C.sub.1-C.sub.6 alkyl or cycloalkyl; or a pharmaceutically acceptable salt thereof, as well as pharmaceutical compositions containing these compounds and methods for their use, including treatment of obsessive-compulsive disorder, panic disorder, depression, anxiety, generalized anxiety disorder, schizophrenia, migraine, sleep disorders, eating disorders, obesity, epilepsy, and spinal cord injury.

 
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