Patent ID: 8822519

Claim:
Compound of formula (I) or its pharmaceutically acceptable salts or solvates thereof, wherein, X is O, S, NH or (CH 2 ) n , in which n is an integer from 1 to 4; Y is O, S or NH, wherein X and Y are not simultaneously O; R is H or C1-C9 alkyl; R 1 and R 2 are independently H or C1-C4 alkyl, and at least one of R 1 and R 2 is H; R 3 is H or C1-C9 alkyl; R 4 is phenyl or substituted phenyl; the substituent group on the phenyl is selected from the group consisting of C1-C9 alkyl, hydroxyl, C1-C9 alkoxy, mercapto, C1-C9 alkylthio, trifluoromethyl, F, Cl, Br, nitro, NR 5 R 6 , COOR 5 , NR 5 COR 6 and CONR 5 R 6 ; G 1 , G 2 , G 3 , G 4 , G 5 , G 6 , G 7 , G 8 and G 9 are independently from each other or simultaneously H, C1-C9 alkyl, hydroxyl, C1-C9 alkoxy, mercapto, C1-C9 alkylthio, trifluoromethyl, F, Cl, Br, nitro, NR 5 R 6 , COOR 5 , NR 5 COR 6 or CONR 5 R 6 ; and R 5 and R 6 are independently from each other or simultaneously H or C1-C9 alkyl.