| 摘要 |
<p>The present invention provide a medicament for treating the diseases induced by production, secretion or deposition of amyloid-² proteins, for example, a compound of the following formula (I) wherein R 1 , R 2a , R 2b , R 3 , R 4 , R 5 , X, L 1 , L 2 , ring A, ring B and the dotted line are defined in the specification, its pharmaceutically acceptable salt or a solvate thereof.</p> |
