| 摘要 |
A compound represented by general formula (I) and an intermediate for the synthesis thereof (wherein R1 represents halogen, lower alkyl, lower alkoxy, hydroxy, nitro, trifluoromethyl, lower alkylthio, acyl, carboxy, mercapto or amino; R2 represents hydrogen, lower alkyl, lower alkenyl, lower alkynyl, alkoxy, acyl, aryl or heterocycle; R3 represents lower alkyl, cycloalkyl, aryl or heterocycle; R4 represents hydrogen, lower alkyl, aryl, heterocycle, - OR5, -SR5 or -NR6R7 (R5 through R7 each representing lower alkyl, etc.); X and Y represent each - CH2-, -NH- or -O-; and n represents 0 to 4). This compound exhibits a selective antagonism against gastrin receptors without exhibiting side effects caused by the CCK-A receptor antagonism, and hence is efficacious for the treatment and prevention of peptic ulcer, gastritis, reflux esophagitis and Zollinger-Ellison syndrome, and for the treatment of neoplasm originating in the gastrointestinal system. <CHEM> |
