Novel glutamate receptor antagonists: Fused cycloalkyl quinoxalinediones

Novel substituted alicyclic fused ring 2,3-quinoxalinediones, pharmaceutical compositions containing the same and the method of using the same, for the blockade of glutamate receptors, including either or both N-methyl-D-aspartate (NMDA) receptors and nonNMDA receptors such as the alpha -amino-3-hydroxy-5-methyl-4-isoxazole propionic acid (AMPA) receptor and the kainate receptor, are described. The novel substituted alicyclic fused ring 2,3-quinoxalinediones may be used, for example, as neuroprotective agents, for treatment of chronic neurodegenerative disorders, as anticonvulsants and in the treatment of schizophrenia, epilepsy, anxiety, pain and drug addiction.