| abstract |
The present invention relates to a compound or a pharmacologically acceptable salt thereof, which has excellent tissue non-specific alkaline phosphatase inhibitory activity. The present invention provides a compound represented by general formula (I) or a pharmacologically acceptable salt thereof: Wherein, R 1 represents a hydrogen atom, an optionally substituted C1-6 alkyl group, etc., R 2 and R 3 are the same or different, and each represents a hydrogen atom, an optionally substituted C1-6 alkyl group, etc., R 4 and R 5 are the same or different, and each represents a hydrogen atom, an optionally substituted C1-6 alkyl group, etc., R 6 represents a hydrogen atom, etc., each R 7 may be the same or different, and each may represent an optionally substituted C1 -6 alkoxy group etc., X represents -CH=, -C(-R 7 )= or -N=, and m represents 1 to 4. |