| abstract |
The present invention provides a compound having a superior acid secretion inhibitory effect and showing an antiulcer activity, which is represented by the formula (I) n nwherein R 1 is an optionally substituted cyclic group, R 2 is a substituent, R 3 is an optionally substituted alkyl group, an acyl group, an optionally substituted hydroxy group, an optionally substituted amino group, a halogen atom, a cyano group or a nitro group, R 4 and R 5 are each a hydrogen atom, an optionally substituted alkyl group, an acyl group, an optionally substituted hydroxy group, an optionally substituted amino group, a halogen atom, a cyano group or a nitro group, R 6 and R 6′ are each a hydrogen atom or an alkyl group, and n is an integer of 0-3, or a salt thereof. |