Patent ID: 7375109

Claim:
A thieno[2,3-d]pyrimidine compound according to formula I, or a pharmaceutically acceptable salt thereof, wherein X is O or H,H A is S, NH, N(R 6 ), O or a bond; R 1 is (1-4C)alkyl, (2-4C)alkenyl, phenyl or (2-5C)heteroaryl, the phenyl or heteroaryl ring optionally being substituted with one or more of the group of substituents: hydroxy, halogen, nitro, trifluoromethyl, cyano, amino or (1-4C)(di)alkylamino; R 2 is H, (1-4C)alkyl, (1-4C)alkoxy(2-4C)alkyl or hydroxy(2-4C)alkyl; R 3 and R 4 can be independently selected from H, (1-4C)alkyl and hydroxy(1-4C)alkyl; R 5 is H or (1-4C)alkyl, and R 6 can be selected from the same groups as described for R 1 .