The present invention provides a compound of formula I: Imidazo substitution type of respect [1,2-a] pyridine, R is -COOH or 2 COOH -CH, gastrointestinal inflammatory diseases and to suppress the stimulation endogenously or exogenously of gastric acid secretion, gastric acid is associated It can be used in the prevention and treatment of diseases. None [Selection Figure]本発明は式I:の置換型のイミダゾ[1,2-a]ピリジンに関し、Rは-CH2COOH又は-COOHであり、胃酸分泌の外因的又は内因的な刺激を抑制し、胃酸が関連する疾患及び胃腸炎症性疾患の予防及び治療に用いることができる。【選択図】なし