Substituted-6H,8H-pyrimido-1,2,3-cdpurine-8,10-(9H)-diones and substituted-6H,10H-pyrimido1,2-cdpurin-10-ones

摘要

Substituted-6H,8H-pyrimido[1,2,3-cd]purine-8,10(9H)-diones and substituted-6H,10H-pyrimido[1,2-cd]purin-10-ones which are useful as cognition enhancing agents, anxiolytic agents and/or antihypertensive agents in the treatment of cognitive and relative neutral behavioral problems, anxiety and hypertension in mammals.