Compound of the formula I, in any of its stereoisomeric forms, or a mixture of stereoisomeric forms in any ratio, or a physiologically acceptable salt thereof, or a physiologically acceptable solvate of such a compound or such a salt, wherein X is selected from the group consisting of (C 1 -C 6)-alkanediyl, (C 2 -C 6)-alkenediyl, (C 2 -C 6) -alkynediyl, (C 3 -C 7)-cycloalkanediyl, (C 1 -C 6)-alkanediyloxy and (C 3 -C 7)-cycloalkanediyloxy; all of which are optionally substituted by one or more identical or different substituents selected from the group consisting of fluorine and hydroxyl, where the oxygen atom of the (C 1 -C 6) -alkanediyloxy and (C 3 -C 7) -cycloalkanediyloxy groups is attached to group Y; Y is selected from the group consisting of phenylene and a bivalent radical of an aromatic 5-membered or 6-membered monocyclic heterocycle which contains 1, 2 or 3 identical or different ring heteroatoms selected from the group consisting of N, O and S, where one of the ring nitrogen atoms may carry a hydrogen atom or a substituent R 4 and where the phenylene and the bivalent radical of an aromatic heterocycle are optionally substituted at one or more ring carbon atoms by identical or different substituents R 5; R 1 is selected from the group consisting of hydrogen and (C 1 -C 4)-alkyl; R 2 and R 3 independently of one another are selected from the group consisting of H, halogen, hydroxyl, (C 1 -C 4) -alkyl-, (C 1 -C 4)-alkyloxy, (C 1 -C 4) -alkyl-S m -, amino, nitro, cyano, hydroxycarbonyl, (C 1 -C 4)-alkyloxycarbonyl, aminocarbonyl and aminosulfonyl, (C 3 -C 7) -cycloalkyl-C w H 2w - and oxy, where w is selected from the group consisting of 0, 1 and 2; R 4 is selected from the group consisting of (C 1 -C 4)-alkyl, (C 3 -C 7)-cycloalkyl-C w H 2w - and oxy, where w is selected from the group consisting of 0, 1 and 2; R 5 is selected from the group consisting of halogen, hydroxyl, (C 1 -C 4)-alkyl-, (C 3 -C 5)-cycloalkyl-C z H 2z -, (C 1 -C 4)-alkyloxy, (C 1 -C 4)-alkyl-S m -, amino, nitro, cyano, hydroxycarbonyl, (C 1 -C 4)-alkyloxycarbonyl, aminocarbonyl and aminosulfonyl, where z is selected from the group consisting of 0, 1 and 2; m is selected from the group consisting of 0, 1 and 2. X is selected from the group consisting of (C 1 -C 6)-alkanediyl, (C 2 -C 6)-alkenediyl, (C 2 -C 6) -alkynediyl, (C 3 -C 7)-cycloalkanediyl, (C 1 -C 6)-alkanediyloxy and (C 3 -C 7)-cycloalkanediyloxy; all of which are optionally substituted by one or more identical or different substituents selected from the group consisting of fluorine and hydroxyl, where the oxygen atom of the (C 1 -C 6) -alkanediyloxy and (C 3 -C 7) -cycloalkanediyloxy groups is attached to group Y; Y is selected from the group consisting of phenylene and a bivalent radical of an aromatic 5-membered or 6-membered monocyclic heterocycle which contains 1, 2 or 3 identical or different ring heteroatoms selected from the group consisting of N, O and S, where one of the ring nitrogen atoms may carry a hydrogen atom or a substituent R 4 and where the phenylene and the bivalent radical of an aromatic heterocycle are optionally substituted at one or more ring carbon atoms by identical or different substituents R 5; R 1 is selected from the group consisting of hydrogen and (C 1 -C 4)-alkyl; R 2 and R 3 independently of one another are selected from the group consisting of H, halogen, hydroxyl, (C 1 -C 4) -alkyl-, (C 1 -C 4)-alkyloxy, (C 1 -C 4) -alkyl-S m -, amino, nitro, cyano, hydroxycarbonyl, (C 1 -C 4)-alkyloxycarbonyl, aminocarbonyl and aminosulfonyl, (C 3 -C 7) -cycloalkyl-C w H 2w - and oxy, where w is selected from the group consisting of 0, 1 and 2; R 4 is selected from the group consisting of (C 1 -C 4)-alkyl, (C 3 -C 7)-cycloalkyl-C w H 2w - and oxy, where w is selected from the group consisting of 0, 1 and 2; R 5 is selected from the group consisting of halogen, hydroxyl, (C 1 -C 4)-alkyl-, (C 3 -C 5)-cycloalkyl-C z H 2z -, (C 1 -C 4)-alkyloxy, (C 1 -C 4)-alkyl-S m -, amino, nitro, cyano, hydroxycarbonyl, (C 1 -C 4)-alkyloxycarbonyl, aminocarbonyl and aminosulfonyl, where z is selected from the group consisting of 0, 1 and 2; m is selected from the group consisting of 0, 1 and 2.