A compound of the formula (I): ##STR1## wherein R.sub.1 is a hydrogen atom or lower alkyl; R.sub.2 is a lower alkoxy, lower alkylamino, lower cycloalkyl, optionally substituted phenyl or optionally substituted heterocyclic group; R.sub.3 is an optionally substituted phenyl; R.sub.4 is an optionally substituted phenyl, optionally substituted cycloalkyl, optionally substituted alkyl or optionally substituted heterocyclic group, or a pharmaceutically acceptable salt thereof, which has a high affinity for gastrin receptors and/or CCK-B receptors but not for CCK-A receptors, and is useful for treating diseases associated with gastrin receptors and/or CCK-B receptors without inducing the side effects associated with CCK-A receptors.
化合物的公式(I):##
STR1##其中R.sub.1是
氢原子或较低的烷基;R.sub.2是较低的烷
氧基,较低的烷基
氨基,较低的
环烷基,可选择取代的
苯基或可选择取代的杂环基;R.sub.3是可选择取代的
苯基;R.sub.4是可选择取代的
苯基,可选择取代的
环烷基,可选择取代的烷基或可选择取代的杂环基,或其药学上可接受的盐,具有高亲和力,用于治疗与胃泌素受体和/或CCK-B受体相关的疾病,而不会引起与CCK-A受体相关的副作用。