Polycyclic pyridopyrazine derivative

A compound represented by the following Formula:

• wherein
• ring A is a C5-C7 non-aromatic carbocycle, which may be further fused with a phenyl ring, a 3- to 7-membered non-aromatic carbocycle, or a 3- to 7-membered non-aromatic heterocycle, and which may form a spiro ring of a 3- to 7-membered non-aromatic carbocycle and a 3- to 7-membered non-aromatic heterocycle;
• ring B is a phenyl ring or a pyridinyl ring;
• Q is of the following rings, wherein the left bond binds to CR2aR2b,
• R1 is each independently halogen, C1-4alkyl, haloC1-4alkyl, C1-4alkyloxy, cyano, or haloC1-4alkyloxy;
• R2a and R2b are each independently hydrogen, C1-4alkyl, or haloC1-4alkyl;
• R3 is C1-4alkyl or haloC1-4alkyl;
• R4 and R5 are each independently hydrogen or C1-4alkyl;
• R6 is each independently halogen, C1-4alkyl, haloC1-4alkyl, C1-4alkyloxy, haloC1-4alkyloxy, or C1-4alkyloxyC1-4alkyl;
• or
• two R6s bonded to a non-adjacent atom may be taken together with each other to form a C1-C3 bridge which may have an intervening heteroatom;
• n is an integer of 1 to 3;
• and
• m is an integer of 0 to 3;
• wherein non-aromatic heterocycle means non-aromatic heterocycle containing 1 or 2 heteroatoms selected from the group consisting of O, S and N,
• or a pharmaceutically acceptable salt thereof.