A compound represented by the following general formula: wherein: X is O or S; each of R 1 and R 2 is independently hydrogen, -OH, -SH, -NH 2, -NO 2, -CN, -COH, -COOH, -CONH 2, halogen, C 1 -C 4 alkyl, -O-C 1 -C 4 alkyl, -S-C 1 -C 4 alkyl, -SO-C 1 -C 4 alkyl, -SO 2 -C 1 -C 4 alkyl, -CO-C 1 -C 4 alkyl, -CO 2 -C 1 -C 4 alkyl, -CONH-C 1 -C 4 alkyl, -C≡C-C 1 -C 4 alkyl, -NHSO 2 -C 1 -C 4 alkyl, -NHCO-C 1 -C 4 alkyl or -C 3 -C 6 cycloalkyl; R 3 is hydrogen, -OH, -SH, -NH 2, -NO 2, -CN, -COH, -COOH, -CONH 2, halogen, -C 1 -C 4 alkyl, -O-C 1 -C 4 alkyl, -S-C 1 -C 4 alkyl, -CO-C 1 -C 4 alkyl, -CO 2 -C 1 -C 4 alkyl, -CONH-C 1 -C 4 alkyl, an aryl having 1-3 substituents selected from the groups in Group A, a heteroaryl having 1-3 substituents selected from the groups in Group A, a C3-C8cycloalkyl having 1-3 substituents selected from the groups in Group A, a nitrogen-containing saturated heterocyclic group having 1-3 substituents selected from the groups in Group A or a nitrogen-containing partially unsaturated heterocyclic group having 1-3 substituents selected from the groups in Group A, wherein, the group in Group A is selected from the group consisting of: hydrogen, halogen, -OH, -SH, -NH 2, -NO 2, -CN, -COH, -COOH, -CONH 2, C 1 -C 4 alkyl, -O-C 1 -C 4 alkyl, -NH-C 1 -C 4 alkyl, -S-C 1 -C 4 alkyl, -SO 2 -C 1 -C 4 alkyl, -CO-C 1 -C 4 alkyl, -CO 2 -C 1 -C 4 alkyl, -CONH-C 1 -C 4 alkyl, -CONH-C 3 -C 6 cycloalkyl, -C 1 -C 4 alkyl-OH, -aryl, -O-aryl, -NH-aryl, -S-aryl, -SO 2 -aryl, -CO-aryl, -CO 2 -aryl, -CONH-aryl, -cycloalkyl, -heteroaryl, -a nitrogen-containing saturated heterocyclic group, -C 1 -C 4 alkyl-a nitrogen-containing saturated heterocyclic group and -a nitrogen-containing partially unsaturated heterocyclic group; R 4 is -O-R 5, -S-R 5, -SO-R 5, -SO 2 -R 5, R 5 is -C 1 -C 4 alkyl or -C 3 -C 8 cycloalkyl; m is 1, 2 or 3; and n is 1 or 2, or a pharmaceutically acceptable salt thereof. X is O or S; each of R 1 and R 2 is independently hydrogen, -OH, -SH, -NH 2, -NO 2, -CN, -COH, -COOH, -CONH 2, halogen, C 1 -C 4 alkyl, -O-C 1 -C 4 alkyl, -S-C 1 -C 4 alkyl, -SO-C 1 -C 4 alkyl, -SO 2 -C 1 -C 4 alkyl, -CO-C 1 -C 4 alkyl, -CO 2 -C 1 -C 4 alkyl, -CONH-C 1 -C 4 alkyl, -C≡C-C 1 -C 4 alkyl, -NHSO 2 -C 1 -C 4 alkyl, -NHCO-C 1 -C 4 alkyl or -C 3 -C 6 cycloalkyl; R 3 is hydrogen, -OH, -SH, -NH 2, -NO 2, -CN, -COH, -COOH, -CONH 2, halogen, -C 1 -C 4 alkyl, -O-C 1 -C 4 alkyl, -S-C 1 -C 4 alkyl, -CO-C 1 -C 4 alkyl, -CO 2 -C 1 -C 4 alkyl, -CONH-C 1 -C 4 alkyl, an aryl having 1-3 substituents selected from the groups in Group A, a heteroaryl having 1-3 substituents selected from the groups in Group A, a C3-C8cycloalkyl having 1-3 substituents selected from the groups in Group A, a nitrogen-containing saturated heterocyclic group having 1-3 substituents selected from the groups in Group A or a nitrogen-containing partially unsaturated heterocyclic group having 1-3 substituents selected from the groups in Group A, wherein, the group in Group A is selected from the group consisting of: hydrogen, halogen, -OH, -SH, -NH 2, -NO 2, -CN, -COH, -COOH, -CONH 2, C 1 -C 4 alkyl, -O-C 1 -C 4 alkyl, -NH-C 1 -C 4 alkyl, -S-C 1 -C 4 alkyl, -SO 2 -C 1 -C 4 alkyl, -CO-C 1 -C 4 alkyl, -CO 2 -C 1 -C 4 alkyl, -CONH-C 1 -C 4 alkyl, -CONH-C 3 -C 6 cycloalkyl, -C 1 -C 4 alkyl-OH, -aryl, -O-aryl, -NH-aryl, -S-aryl, -SO 2 -aryl, -CO-aryl, -CO 2 -aryl, -CONH-aryl, -cycloalkyl, -heteroaryl, -a nitrogen-containing saturated heterocyclic group, -C 1 -C 4 alkyl-a nitrogen-containing saturated heterocyclic group and -a nitrogen-containing partially unsaturated heterocyclic group; R 4 is -O-R 5, -S-R 5, -SO-R 5, -SO 2 -R 5, R 5 is -C 1 -C 4 alkyl or -C 3 -C 8 cycloalkyl; m is 1, 2 or 3; and n is 1 or 2,