Cyclopentane compound

A compound represented by the formula (I):

• [in the formula,
• ring A is C6-10 aryl, 5- or 6-membered heteroaryl, or 9- or 10-membered heteroaryl;
• R1 is a group selected from the group consisting of the following (a) to (c):
• (a) —NRaRa′,
• Ra and Ra′ are each independently a hydrogen atom, a hydroxy group, C1-6 alkyl, C1-6 alkoxy, hydroxy C1-6 alkyl, C1-6 alkoxy C1-6 alkyl, or halo C1-6 alkyl;
• Rb is a hydrogen atom, a halogen atom, C1-6 alkyl, C1-6 alkoxy, or halo C1-6 alkyl;
• p is an integer number of 1 to 3;
• when p is 2 or 3, these Rb are the same or different from each other;
• q is an integer number of 1 to 3;
• r is 1 or 2;
• R2 is C1-6 alkyl, C2-6 alkenyl, C3-8 cycloalkyl which may be substituted by 1 to 3 C1-6 alkyl, 3- to 8-membered heterocycloalkyl which may be substituted by 1 to 3 C1-6 alkyl, halo C1-6 alkyl, or C1-6 alkylamino;
• R3 and R4 are each independently a hydrogen atom, a halogen atom, C1-6 alkyl, or C1-6 alkoxy;
• R5 and R6 are each independently a hydrogen atom or a halogen atom;
• R7 is a hydrogen atom, a halogen atom, a hydroxy group, an amino group, C1-6 alkyl, halo C1-6 alkyl, C1-6 alkoxy, or C1-6 alkylamino;
• R8 is a hydrogen atom, a halogen atom, a hydroxy group, a cyano group, C1-6 alkyl, C1-6 alkoxy, halo C1-6 alkyl, or C1-6 alkylamino;
• n is 1 or 2;
• when n is 2, these R7 are the same or different from each other;
• and
• m is 1 or 2;
• when m is 2, these R8 are the same or different from each other];
• or a pharmaceutically acceptable salt thereof.