摘要 |
<p>Compounds are provided of the following general structure: <CHEM> wherein R1, R2 and R3 are independently selected from hydrogen or methyl and A is amino, C1-C4 monoalkylamino, C2-C8 dialkylamino, cyclopropylamino, 1-pyrrolidinyl, 1-piperidinyl or 4-morpholinyl. They are useful for providing sedative and antiepileptic activity.</p> |