abstract |
Compounds of formula (I), wherein ring A, ring B, ring D, R<2>, R<3>, R<4>, R<5>, R<6>, R<11>, R<12>, R<13>, E, G, X and P are as defined below. The compounds of formula (I) are cholinesterase inhibitors and are useful in enhancing memory in patients suffering from dementia and Alzheimer's disease. |