The present invention provides compounds, which, are novel antagonists for D.sub.1/D.sub.5 receptors as well as methods for preparing such compounds. In another embodiment, the invention provides pharmaceutical compositions comprising such D.sub.1/D.sub.5 receptor antagonists as well as methods of using them to treat CNS disorders, obesity, metabolic disorders, eating disorders such as hyperphagia, and diabetes.

 
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> Substituted 2-(diaza-bicyclo-alkyl)-pyrimidone derivatives

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