| 摘要 |
<p>The present invention relates to a novel condensed heterocyclic compound of formula (I) wherein R1 is alkyl, etc.; R2 is hydrogen, etc.; R?3 and R4¿ are each independently hydrogen, etc.; a group of formula (a) is the group of formula (b), etc.; and a pharmaceutically acceptable salt thereof, which is useful as a medicament; the processes for the preparation of said condensed heterocyclic compound or a salt thereof; a pharmaceutical composition comprising said condensed heterocyclic compound or a pharmaceutically acceptable salt thereof; etc.</p> |
