Compounds of Formula (I): ##STR00001## or pharmaceutically acceptable salts thereof, are useful in the prophylactic and therapeutic treatment of hyperglycemia and diabetes.

 
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> Substituted 2-pyridinyl-6,7,8,9-tetrahydropyrimido{1,2-a}pyrimidin-4-one and 7-pyridinyl-2,3-dihydroimidazo{1,2-a}pyrimidin-5(1h)one derivatives
~ 00346