| abstract |
New heterocyclic compounds having the general formulan wherein R³ isn or CO₂R′ wherein R′ is C₁₋₆-alkyl, C₃₋₇-cycloalkyl or C₁₋₆-alkoxymethyl; R⁴ is C₁₋₆-alkyl; -S- isn and wherein R⁵ and R⁶ independently are hydrogen, C₁₋₆-alkyl, or aryl. n The compounds are useful in psychopharmaceutical preparations as anticonvulsants, anxiolytics, hypnotics, and in improving the cognitive function of the brain of mammals. |