| abstract |
The present invention relates to a compound represented by the formula: wherein A is pyridyl group having at least one substituent wherein R 1 , R 2 and R 3 are each a hydrogen atom, a halogen atom, a C 1-6 alkyl group optionally substituted by halogen or a C 1-6 alkoxy group optionally substituted by halogen, R 4 and R 6 are each a hydrogen atom, a halogen atom or a C 1-6 alkyl group optionally substituted by halogen, R 5 is a hydrogen atom, a halogen atom, a C 1-6 alkyl group optionally substituted by halogen or a C 1-6 alkoxy group optionally substituted by halogen, and R 7 is a hydrogen atom or a C 1-6 alkyl group optionally substituted by halogen or a salt thereof, or a pharmaceutical composition containing the same. |