abstract |
Provided is a compound having a superior acid secretion suppressive action, antiulcer activity and the like. A compound represented by the formula (see formula I) wherein R1 is a substituent, R2 is a hydrogen atom, a C1-6 alkyl group optionally having a halogen atom or a cyano group, R3 is a hydrogen atom, a halogen atom, a cyano group, a C1-6 alkyl group optionally having a halogen atom or a C1-6 alkoxy group optionally having a halogen atom, one of R2 and R3 is a hydrogen atom, and the other is a substituent other than a hydrogen atom, or a salt thereof. |