3,3-DISUBSTITUTED TRI-AND TETRACYCLIC INDOLIN-2-ONES USEFUL FOR THE TREATMENT OF COGNITIVE DISORDERS

摘要

Compounds of formula (I) have been shown to enhance the release of the neurotransmitter acetylcholine, and thus may be useful as chemical intermediates and as pharmacological agents in the treatment of diseases of man, such as in Alheimer's Disease and other conditions involving learning and cognition, where subnormal levels of this neurochemical are found. The compounds of this invention have the structure shown in formula (I).