The present application provides compounds represented by formula (I): <; EMI ID = The compound of the present invention has an excellent acid secretion inhibiting effect and exhibits an anti-ulcer activity.본 출원은 화학식 (I) 로 나타내는 화합물을 제공한다:본 발명의 화합물은 뛰어난 산 분비 억제 효과를 갖고 있으며, 항궤양 활성을 나타낸다.