| 摘要 |
<p>Quinazoline derivatives represented by formula (I) or salts thereof: wherein R?1 and R2¿ each represents hydrogen, lower alkyl, lower alkoxyalkyl, etc.; R3 represents hydrogen, lower alkyl, optionally substituted amino, etc.; R4 represents hydrogen, lower alkyl, etc.; R?5 and R6¿ each represents hydrogen or lower alkyl; X represents a single bond, lower alkylene, etc.; C...Y represents CH-OH, C=O, etc.; a is 0 or 1; and A represents aryl, heterocycle, aralkyl, etc. The compounds have an affinity for a serotonin 4 receptor and are useful as a remedy for digestive diseases, etc.</p> |
