Quinoxaline compounds having the formula I
wherein
R¹ is H, NO₂, CN, CF₃ or halogen, R² and R³ independently are H, CN, CF₃, halogen, C(NOH)C₁₋₆- alkyl, COR⁴ or SO₂R⁴, wherein R⁴ is C₁₋₆-alkyl, optionally substituted, or NR⁵R⁶, wherein R⁵, R⁶ independently are H, C₃₋₆-cycloalkyl, C₁₋₆-alkyl-, optionally substituted, compositions thereof and methods of preparing the compounds are described.The compounds are useful in the treatment of indications caused by hyperactivity of the excitatory neurotransmitters.