Patent ID: 7803826

Claim:
A compound represented by formula (I): wherein, n is an integer selected from 1 to 20, Q is A is cyano group, —COOR 3 , —CONR 3 R 4 , a C 1 -C 4 alkyl group which may be substituted by one or more halogen atoms, or a nitro group; B is a hydrogen atom, a halogen atom, —OR 3 or a C 1 -C 4 alkyl group which may be substituted by one or more halogen atoms; X 1 and X 2 are independently selected from O and S; m is an integer selected from 0 to 3; E is independently a C 1 -C 4 alkyl group; R 1 and R 2 are independently selected from a hydrogen atom, a C 1 -C 6 alkyl group, and a C 1 -C 6 alkylcarbonyl group; R 3 and R 4 are independently selected from a hydrogen atom and a C 1 -C 6 alkyl group; with the proviso that when X 1 is O and X 2 is S, Q is not 4-cyano-3-trifluoromethylphenyl group, or a pharmaceutically acceptable salt, or a prodrug thereof.