Spiro compounds containing five-membered rings

摘要

Compounds useful for treating diseases of the central or peripheral nervous system in mammals have formulae I-XIII: <IMAGE> I <IMAGE> II <IMAGE> III <IMAGE> IV <IMAGE> V <IMAGE> VI AGE> X <IMAGE> XI <IMAGE> XII <IMAGE> XIII wherein ring A or A' together with the spiro-carbon atom constitutes a bridged or unbridged ring containing one or two ring nitrogen atoms; and the other symbols have specified values,