| abstract |
The invention relates to a compound that suppresses acid secretion more strongly and has an antiulcer effect, etc. The compound is represented by the formula EMBED ISISServer, (I) where R1 is a substituent, R2 is (i) a hydrogen atom, (ii) C1-6-alkyl, which optionally contains a halogen atom, or (iii) a cyano group, R3 means (i) a hydrogen atom , (ii) a halogen atom, (iii) a cyano group, (iv) C1-6 alkyl, which optionally contains a halogen atom, or (v) C1-6 alkoxy, which optionally contains a halogen atom, one of R2 and R3 means an atom hydrogen and the other is a substituent that is not a hydrogen atom, or its salt. |