A compound of formula: wherein G 1 and G 2, identical or different each other, are CH or N, provided that at least one of G 1 and G 2 is N; R 1 is hydrogen atom, halogen atom, OH, (C 1-3)alkyl, (C 1-3)alkoxy, (C 1-3)alkyl-OH, -COOR' or -CONR'R", wherein R' and R", identical or different each other, are hydrogen atom or (C 1-3)alkyl; L 1 is a σ bond, -CH 2 -, -O- or -NH-; Y is (C 1-6)alkylenyl group, -NH-(C 1-6)alkylenyl group or (C 4-5)cycloalkylenyl group, said group being optionally substituted with a hydroxy group or an amino group or a formamido group-(NH-CHO); L 2 is σ bond, -NH- or -NH-(C 1-6)alkylenyl-; A is a fused bicyclic group having formula wherein G 3 is N or C(R'), wherein R' is H or (C 1-3)alkyl; G 4, G 5, and G 6 identical or different each other, are CH, CF, C-CN, or N, R 2 is hydrogen atom, halogen atom, hydroxy, cyano, (C 1-3)alkyl, (C 1-3)alkoxy, CF 3, OCF3 or NR'R", wherein R' and R", identical or different each other, are hydrogen atom or (C 1-3)alkyl; and R 3 is hydrogen atom, halogen atom, hydroxy, cyano, (C 1-3)alkyl, (C 1-3)alkoxy, trifluoromethyl or NR'R", wherein R' and R" are hydrogen atom or (C 1-3)alkyl; and B is a fused bicyclic group having the following formula, or a fused tricyclic group having the following formula: wherein P 1 is N or CR', wherein R' is H, CN or CF 3; n is 0 or 1; and R 6 is hydrogen atom, halogen atom, CF 3, hydroxy or NR'R". wherein R' and R", identical or different each other, are hydrogen atom or (C 1-3)alkyl; and addition salts with pharmaceutically acceptable organic or inorganic acids or bases, enantiomers, N-oxides and quaternary ammonium salts of said compound of formula. G 1 and G 2, identical or different each other, are CH or N, provided that at least one of G 1 and G 2 is N; R 1 is hydrogen atom, halogen atom, OH, (C 1-3)alkyl, (C 1-3)alkoxy, (C 1-3)alkyl-OH, -COOR' or -CONR'R", wherein R' and R", identical or different each other, are hydrogen atom or (C 1-3)alkyl; L 1 is a σ bond, -CH 2 -, -O- or -NH-; Y is (C 1-6)alkylenyl group, -NH-(C 1-6)alkylenyl group or (C 4-5)cycloalkylenyl group, said group being optionally substituted with a hydroxy group or an amino group or a formamido group-(NH-CHO); L 2 is σ bond, -NH- or -NH-(C 1-6)alkylenyl-; A is a fused bicyclic group having formula wherein G 3 is N or C(R'), wherein R' is H or (C 1-3)alkyl; G 4, G 5, and G 6 identical or different each other, are CH, CF, C-CN, or N, R 2 is hydrogen atom, halogen atom, hydroxy, cyano, (C 1-3)alkyl, (C 1-3)alkoxy, CF 3, OCF3 or NR'R", wherein R' and R", identical or different each other, are hydrogen atom or (C 1-3)alkyl; and R 3 is hydrogen atom, halogen atom, hydroxy, cyano, (C 1-3)alkyl, (C 1-3)alkoxy, trifluoromethyl or NR'R", wherein R' and R" are hydrogen atom or (C 1-3)alkyl; G 3 is N or C(R'), wherein R' is H or (C 1-3)alkyl; G 4, G 5, and G 6 identical or different each other, are CH, CF, C-CN, or N, R 2 is hydrogen atom, halogen atom, hydroxy, cyano, (C 1-3)alkyl, (C 1-3)alkoxy, CF 3, OCF3 or NR'R", wherein R' and R", identical or different each other, are hydrogen atom or (C 1-3)alkyl; and R 3 is hydrogen atom, halogen atom, hydroxy, cyano, (C 1-3)alkyl, (C 1-3)alkoxy, trifluoromethyl or NR'R", wherein R' and R" are hydrogen atom or (C 1-3)alkyl; and B is a fused bicyclic group having the following formula, or a fused tricyclic group having the following formula: wherein P 1 is N or CR', wherein R' is H, CN or CF 3; n is 0 or 1; and R 6 is hydrogen atom, halogen atom, CF 3, hydroxy or NR'R". wherein R' and R", identical or different each other, are hydrogen atom or (C 1-3)alkyl; P 1 is N or CR', wherein R' is H, CN or CF 3; n is 0 or 1; and R 6 is hydrogen atom, halogen atom, CF 3, hydroxy or NR'R". wherein R' and R", identical or different each other, are hydrogen atom or (C 1-3)alkyl; and addition salts with pharmaceutically acceptable organic or inorganic acids or bases, enantiomers, N-oxides and quaternary ammonium salts of said compound of formula.