The present invention provides a compound having a superior acid secretion inhibitory effect and showing an antiulcer activity and the like. The present invention provides a compound represented by the formula (I) wherein R
1
is a nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle, the nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle optionally has substituent(s), R
2
is an optionally substituted C
6-14
aryl group, an optionally substituted thienyl group or an optionally substituted pyridyl group, R
3
and R
4
are each a hydrogen atom, or one of R
3
and R
4
is a hydrogen atom and the other is an optionally substituted lower alkyl group, an acyl group, a halogen atom, a cyano group or a nitro group, and R
5
is an alkyl group or a salt thereof.
本发明提供一种具有优异的抑制酸分泌作用并具有抗溃疡活性等的化合物。本发明提供一种由式(I)表示的化合物,其中R1是一种含氮的单环杂环基,可选择与苯环或杂环缩合,该含氮的单环杂环基可选择与苯环或杂环具有取代基,R2是可选择取代的C6-14芳基、可选择取代的
噻吩基或可选择取代的
吡啶基,R3和R4分别是氢原子,或者R3和R4中的一个是氢原子,另一个是可选择取代的低碳基、酰基、卤素原子、
氰基或硝基,R5是烷基或其盐。