A compound of the following formula: wherein R A is a group of the following formula (A-1): wherein ring A 1 represents a phenyl group which may be substituted; R B is a group of the following formula (B-4): wherein X a represents CR 3a or N, (i) when X a represents CR 3a, X b represents CHR 3b, X c represents O or NR 4c, X b represents O, X c represents NR 4c, or X b represents NR 4b, X c represents O, NR 4c, or CHR 3c, (ii) when X a represents N, X b represents CHR 3b or C(=O), X c represents NR 4c, or X b represents NR 4b, X c represents CHR 3c; R 3a represents a hydrogen atom, a hydroxyl group, an alkyl group, or an amino group, each of R 3b and R 3c represents a group selected independently from the group consisting of a hydrogen atom, a hydroxyl group, and an alkyl group, each of R 4b and R 4c represents a group selected independently from the group consisting of a hydrogen atom, an alkyl group, and a cycloalkyl group; R B6 represents a hydrogen atom or an alkyl group; R B7 represents (i) an alkyl group which may be substituted, (ii) a cycloalkyl group which may be substituted, (iii) an aliphatic heterocyclic group which may be substituted, (iv) a heteroaryl group which may be partially hydrogenated and may be substituted, or (v) a hydrogen atom, or, when X c represents NR 4c, R B7 and R 4c are bound to each other at their terminus to form an aliphatic heterocyclic group, which may be substituted with an alkyl group which may be substituted, together with a nitrogen atom to which they are bound, or a pharmaceutically acceptable salt thereof provided that the following formulae (a), (b) and (c): are excluded. R A is a group of the following formula (A-1): wherein ring A 1 represents a phenyl group which may be substituted; R B is a group of the following formula (B-4): wherein X a represents CR 3a or N, (i) when X a represents CR 3a, X b represents CHR 3b, X c represents O or NR 4c, X b represents O, X c represents NR 4c, or X b represents NR 4b, X c represents O, NR 4c, or CHR 3c, (ii) when X a represents N, X b represents CHR 3b or C(=O), X c represents NR 4c, or X b represents NR 4b, X c represents CHR 3c; (i) when X a represents CR 3a, X b represents CHR 3b, X c represents O or NR 4c, X b represents O, X c represents NR 4c, or X b represents NR 4b, X c represents O, NR 4c, or CHR 3c, X b represents CHR 3b, X c represents O or NR 4c, X b represents O, X c represents NR 4c, or X b represents NR 4b, X c represents O, NR 4c, or CHR 3c, (ii) when X a represents N, X b represents CHR 3b or C(=O), X c represents NR 4c, or X b represents NR 4b, X c represents CHR 3c; X b represents CHR 3b or C(=O), X c represents NR 4c, or X b represents NR 4b, X c represents CHR 3c; R 3a represents a hydrogen atom, a hydroxyl group, an alkyl group, or an amino group, each of R 3b and R 3c represents a group selected independently from the group consisting of a hydrogen atom, a hydroxyl group, and an alkyl group, each of R 4b and R 4c represents a group selected independently from the group consisting of a hydrogen atom, an alkyl group, and a cycloalkyl group; R B6 represents a hydrogen atom or an alkyl group; R B7 represents (i) an alkyl group which may be substituted, (ii) a cycloalkyl group which may be substituted, (iii) an aliphatic heterocyclic group which may be substituted, (iv) a heteroaryl group which may be partially hydrogenated and may be substituted, or (v) a hydrogen atom, or, (i) an alkyl group which may be substituted, (ii) a cycloalkyl group which may be substituted, (iii) an aliphatic heterocyclic group which may be substituted, (iv) a heteroaryl group which may be partially hydrogenated and may be substituted, or (v) a hydrogen atom, or, when X c represents NR 4c, R B7 and R 4c are bound to each other at their terminus to form an aliphatic heterocyclic group, which may be substituted with an alkyl group which may be substituted, together with a nitrogen atom to which they are bound, or a pharmaceutically acceptable salt thereof provided that the following formulae (a), (b) and (c):