| 摘要 |
The compound of the formula: <IMAGE> where R1 is H, alkyl, perhaloalkyl, arylalkyl, alkenyl or alkynyl; R2 is H when R4 is other than H, and, when R4 is H, R2 is <IMAGE> in which R5 is hydrogen or alkyl; R3 is hydrogen or halogen; R4 is H or <IMAGE> X, Y and Z are, independently, nitrogen or carbon, at least one of X, Y or Z being nitrogen; n is 1 or 2; n1 is 0, 1, 2, 3, 4, or 5; or a pharmaceutically acceptable salt thereof are centrally active muscarinic agents.
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