摘要 |
<p>The present invention relates to a compound of Formula I or a pharmaceutically acceptable salt thereof, its preparation method, a pharmaceutical composition comprising the compound, and its use in manufacture of a medicament for treatment of a disease or disorder, wherein R 1 , R 2 , R 5 , R 6 , X, Y, Q, W, n 1 and n 2 are defined as those stated in the description.</p> |