Compounds of the formula I in which A 1 denotes N or CR 1, A 2 denotes N or CR 2, A 3, A 4, A 5, A 6 each, independently of one another, denote N or CR 3, X is absent or denotes unbranched or branched alkylene having 1-10 C atoms, in which 1-7 H atoms may be replaced by OH, F and/or Cl, and/or in which one or two non-adjacent CH and/or CH 2 groups may be replaced by O, N, NH, NA', CO, S, SO, SO 2, OCO, NHCONH, NHCO, NHSO 2, COO, CONH and/or CH=CH groups, or cycloalkylene having 3-7 C atoms, L 2 is absent or denotes unbranched or branched alkylene having 1-10 C atoms, in which 1-7 H atoms may be replaced by OH, F and/or Cl, and/or in which one or two non-adjacent CH and/or CH 2 groups may be replaced by O, N, NH, NA', CO, S, SO, SO 2, OCO, NHCONH, NHCO, NHSO 2, COO, CONH and/or CH=CH groups, or cycloalkylene having 3-7 C atoms, with the proviso that X and L 2 cannot be absent simultaneously, R denotes H or unbranched or branched alkyl having 1-10 C atoms, in which 1-7 H atoms may be replaced by F and/or Cl and/or in which one or two non-adjacent CH and/or CH 2 groups may be replaced by O, N, NH, NA', CO, S, SO, SO 2, OCO, NHCONH, NHCO, NHSO 2, COO, CONH and/or CH=CH groups, or cyclic alkyl having 3-7 C atoms, R 1 denotes H or unbranched or branched alkyl having 1-10 C atoms, in which 1-7 H atoms may be replaced by F and/or Cl and/or in which one or two non-adjacent CH and/or CH 2 groups may be replaced by O, N, NH, NA', CO, S, SO, SO 2, OCO, NHCONH, NHCO, NHSO 2, COO, CONH and/or CH=CH groups, or cyclic alkyl having 3-7 C atoms, R 2 denotes H or unbranched or branched alkyl having 1-10 C atoms, in which 1-7 H atoms may be replaced by F and/or Cl and/or in which one or two non-adjacent CH and/or CH 2 groups may be replaced by O, N, NH, NA', CO, S, SO, SO 2, OCO, NHCONH, NHCO, NHSO 2, COO, CONH and/or CH=CH groups, or cyclic alkyl having 3-7 C atoms, R 3 denotes H or unbranched or branched alkyl having 1-10 C atoms, in which 1-7 H atoms may be replaced by F and/or Cl and/or in which one or two non-adjacent CH and/or CH 2 groups may be replaced by O, N, NH, NA', CO, S, SO, SO 2, OCO, NHCONH, NHCO, NHSO 2, COO, CONH and/or CH=CH groups, or cyclic alkyl having 3-7 C atoms, A' in each case, independently of one another, denotes unbranched or branched alkyl having 1-10 C atoms, in which 1-7 H atoms may be replaced by F and/or Cl, and/or in which one or two non-adjacent CH and/or CH 2 groups may be replaced by O, N, NH, NA, S, SO, SO 2 and/or CH=CH groups, or cyclic alkyl having 3-7 C atoms, A denotes alkyl having 1, 2, 3 or 4 C atoms, and pharmaceutically usable salts, tautomers and stereoisomers thereof, including mixtures thereof in all ratios. A 1 denotes N or CR 1, A 2 denotes N or CR 2, A 3, A 4, A 5, A 6 each, independently of one another, denote N or CR 3, X is absent or denotes unbranched or branched alkylene having 1-10 C atoms, in which 1-7 H atoms may be replaced by OH, F and/or Cl, and/or in which one or two non-adjacent CH and/or CH 2 groups may be replaced by O, N, NH, NA', CO, S, SO, SO 2, OCO, NHCONH, NHCO, NHSO 2, COO, CONH and/or CH=CH groups, or cycloalkylene having 3-7 C atoms, L 2 is absent or denotes unbranched or branched alkylene having 1-10 C atoms, in which 1-7 H atoms may be replaced by OH, F and/or Cl, and/or in which one or two non-adjacent CH and/or CH 2 groups may be replaced by O, N, NH, NA', CO, S, SO, SO 2, OCO, NHCONH, NHCO, NHSO 2, COO, CONH and/or CH=CH groups, or cycloalkylene having 3-7 C atoms, with the proviso that X and L 2 cannot be absent simultaneously, R denotes H or unbranched or branched alkyl having 1-10 C atoms, in which 1-7 H atoms may be replaced by F and/or Cl and/or in which one or two non-adjacent CH and/or CH 2 groups may be replaced by O, N, NH, NA', CO, S, SO, SO 2, OCO, NHCONH, NHCO, NHSO 2, COO, CONH and/or CH=CH groups, or cyclic alkyl having 3-7 C atoms, R 1 denotes H or unbranched or branched alkyl having 1-10 C atoms, in which 1-7 H atoms may be replaced by F and/or Cl and/or in which one or two non-adjacent CH and/or CH 2 groups may be replaced by O, N, NH, NA', CO, S, SO, SO 2, OCO, NHCONH, NHCO, NHSO 2, COO, CONH and/or CH=CH groups, or cyclic alkyl having 3-7 C atoms, R 2 denotes H or unbranched or branched alkyl having 1-10 C atoms, in which 1-7 H atoms may be replaced by F and/or Cl and/or in which one or two non-adjacent CH and/or CH 2 groups may be replaced by O, N, NH, NA', CO, S, SO, SO 2, OCO, NHCONH, NHCO, NHSO 2, COO, CONH and/or CH=CH groups, or cyclic alkyl having 3-7 C atoms, R 3 denotes H or unbranched or branched alkyl having 1-10 C atoms, in which 1-7 H atoms may be replaced by F and/or Cl and/or in which one or two non-adjacent CH and/or CH 2 groups may be replaced by O, N, NH, NA', CO, S, SO, SO 2, OCO, NHCONH, NHCO, NHSO 2, COO, CONH and/or CH=CH groups, or cyclic alkyl having 3-7 C atoms, A' in each case, independently of one another, denotes unbranched or branched alkyl having 1-10 C atoms, in which 1-7 H atoms may be replaced by F and/or Cl, and/or in which one or two non-adjacent CH and/or CH 2 groups may be replaced by O, N, NH, NA, S, SO, SO 2 and/or CH=CH groups, or cyclic alkyl having 3-7 C atoms, A denotes alkyl having 1, 2, 3 or 4 C atoms,