The present invention provides a heterocyclic compound represented by the following formula (I), which has a glucagon antagonistic action and is useful for the prophylaxis or treatment of diabetes and the like, a compound represented by
wherein ring A is an optionally substituted benzene ring and the like; Y is a nitrogen atom and the like; X is —O— and the like; R
4
is a hydrogen atom and the like; R
5
and R
6
are each independently a hydrogen atom and the like; R
1
is an optionally substituted hydrocarbon group and the like; R
2
is a hydrogen atom and the like; and R
3
is —(CH
2
)
3
—COOH and the like, or a salt thereof.
本发明提供了一种由以下式(I)表示的
杂环化合物,该化合物具有
葡萄糖高升素拮抗作用,并可用于预防或治疗糖尿病等疾病,其中,式中环A为可选取代
苯环等;Y为
氮原子等;X为—O—等;R4为
氢原子等;R5和R6各自独立地为
氢原子等;R1为可选取代的
碳氢基团等;R2为
氢原子等;R3为—(
CH2)3—COOH等,或其盐。