| abstract |
This invention relates to novel compounds having the structural formula I below: n n n n n n n n n n and their pharmaceutically acceptable salts, tautomers or in vivo-hydrolysable precursors, compositions and methods of use thereof, wherein R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are defined in the specification. These novel compounds provide a treatment or prophylaxis of anxiety disorders, schizophrenia, cognitive disorders, and/or mood disorders. |