Bicyclic compounds

A bicyclic compound of formula (1):

• wherein Ring Q is pyridine or pyrimidine;
• Ring A is benzene or a heteroaromatic ring;
• G is
• or an amino optionally substituted by one or two selected from the group consisting of alkyl(s), aralkyl(s) and cycloalkyl(s);
• Ring B is benzene, a heterocyclic ring, a cycloalkane or a cycloalkene;
• R1 is a group selected from the following formulae:
• R2 and R3 may be the same or different from each other, and each is cyano, nitro, hydroxyl, an alkoxy, a halogen, carboxyl, an alkoxycarbonyl, an optionally substituted carbamoyl, an optionally substituted amino or an optionally substituted alkyl;
• provided that when m is 2, two R2s may be the same or different from each other, and when n is 2, two R3s may be the same or different from each other;
• m and n may be the same or different from each other, and each is 0, 1 or 2;
• R4 is hydrogen, a halogen, cyano, an alkoxy, hydroxyl, carbamoyl, an optionally substituted amino, an optionally substituted alkyl, an optionally substituted aryloxy, a cycloalkyloxy or an optionally substituted heterocyclic group;
• and
• R5 and R6 may be the same or different from each other, and each is hydrogen, an optionally substituted alkyl, an optionally substituted cycloalkyl where the cycloalkyl may be fused with an aryl, an optionally substituted aryl, an optionally substituted heterocyclic group, or an alkoxycarbonyl, or R5 and R6 may form an optionally substituted heterocyclic ring in combination with atoms to which they are bonded, excluding 4-amino-5-(4-cyanophenyl)pyrimidine,
• or a pharmaceutically acceptable salt thereof.