| 摘要 |
PCT No. PCT/IB95/00189 Sec. 371 Date Feb. 19, 1997 Sec. 102(e) Date Feb. 19, 1997 PCT Filed Mar. 20, 1995 PCT Pub. No. WO95/29909 PCT Pub. Date Nov. 9, 1995This invention relates to compounds of formula (IA), (IB), (IC) or (ID), wherein m, X, Z, R2, R3, R4, R5, R6, R14 and the dotted lines are as defined below, their pharmaceutically acceptable salts, pharmaceutical compositions containing them and methods of using them to treat Alzheimer's disease, age-associated memory impairment, Parkinson's disease and other central nervous system disorders. The claimed compounds have the ability to enhance the release of neurotransmitters such as acetylcholine, dopamine and serotonin. <IMAGE> (IA) |
