Patent ID: 7872004

Claim:
A compound represented by the following formula [I] or a pharmaceutically acceptable salt thereof, or a solvate thereof: wherein ring A is a monocyclic heterocyclic group optionally substituted by 1 to 5 substituents selected from the following group A, wherein the monocyclic heterocyclic group contains, besides carbon atom, at least one hetero atom selected from nitrogen atom, oxygen atom and sulfur atom; group A is a group consisting of halogen atom, C 1-4 alkyl group, —(CH 2 ) n —OR a1 , —NR a3 R a4 , —COR a2 and —CONR a3 R a4 , wherein R a1 , R a2 , R a3 and R a4 are the same or different and each is a hydrogen atom or a C 1-4 alkyl group, and n is 0 or an integer of 1 to 4; R 1 is a hydrogen atom, a C 1-6 alkyl group optionally substituted by 1 to 3 substituents selected from the following group B, a C 3-10 carbon ring group optionally substituted by 1 to 5 substituents selected from the above-mentioned group A, or a heterocyclic group optionally substituted by 1 to 5 substituents selected from the above-mentioned group A, wherein the heterocyclic group contains, besides carbon atom, at least one hetero atom selected from nitrogen atom, oxygen atom and sulfur atom; group B is a group consisting of a C 3-10 carbon ring group optionally substituted by 1 to 5 substituents selected from the above-mentioned group A, a heterocyclic group optionally substituted by 1 to 5 substituents selected from the above-mentioned group A, wherein the heterocyclic group is as defined above, halogen atom, cyano group, —OR b1 , —SR b1 , —NR b2 R b3 , —CONR b2 R b3 , —SO 2 NR b2 R b3 , —COR b1 , —NR b2 COR b1 , —SO 2 R b1 , —NR b2 SO 2 R b1 , —COOR b1 , —NR b2 COOR b1 and —NR b4 CO—NR b2 R b3 wherein R b1 , R b2 , R b3 and R b4 are the same or different and each is a hydrogen atom, a C 1-4 alkyl group, a C 3-10 carbon ring group optionally substituted by 1 to 5 substituents selected from the above-mentioned group A, or a heterocyclic group optionally substituted by 1 to 5 substituents selected from the above-mentioned group A, wherein the heterocyclic group is as defined above; R 2 is a hydrogen atom, a C 1-4 alkyl group or —OR 11 , wherein R 11 is a hydrogen atom or a C 1-4 alkyl group; R 3 and R 4 are the same or different and each is a hydrogen atom, a halogen atom, a C 1-4 alkyl group or —OR R 12 , wherein R 12 is a hydrogen atom or a C 1 - 4 alkyl group; R 5 is each independently, a halogen atom, a C 1-4 alkyl group or —OR R 13 , wherein R 13 is a hydrogen atom or a C 1-4 alkyl group; m is 0, 1 or 2; and R 6 is a hydrogen atom, or R 1 and R 6 form, together with the carbon atoms bonded thereto, a C 3-10 cycloalkyl group optionally substituted by 1 to 5 substituents selected from the above-mentioned group A.