| abstract |
Provided is a compound having a superior acid secretion suppressive action, antiulcer activity and the like. n A compound represented by the formula n n n n n n n n n n wherein R 1 is a substituent, R 2 is (i) a hydrogen atom, (ii) a C 1-6 alkyl group optionally having a halogen atom or (iii) a cyano group, R 3 is (i) a hydrogen atom, (ii) a halogen atom, (iii) a cyano group, (iv) a C 1-6 alkyl group optionally having a halogen atom or (v) a C 1-6 alkoxy group optionally having a halogen atom, one of R 2 and R 3 is a hydrogen atom, and the other is a substituent other than a hydrogen atom, or a salt thereof. |