Pyridazino(4,5-b)(1,5)oxazepinone, thiazepinone and diazepinone compounds of formula(I)and their tautomers and the acid-addition salts of all these compounds show memory-enhancing and neuroprotective properties.
Pyridazino(4,5-b)(1,5)oxazepinone, -thiazepinone and -diazepinone compounds