Patent ID: 7001910

Claim:
A compound of the general formula wherein: R 1 is: H or C 1 –C 6 alkyl, R 2 : H, C 1 –C 6 alkyl, halogen (F, Cl, Br, I), OR 5 , SR 5 , NR 5 R 6 , NO 2 , or phenyl, R 3 : H, C 1 –C 6 alkyl, halogen (F, Cl, Br, I), OR 5 , SR 5 , NR 5 R 6 , NO 2 , or phenyl, R 4 : H, C 1 –C 6 alkyl, halogen (F, Cl, Br, I), OR 5 , NR 5 R 6 , phenyl, or R 3 and R 4 , when taken together, are —CH═CH—CH═CH— forming a fused ring on the pyrimidine ring R 5 , R 6 : independently to each other, may be H or C 1 –C 6 alkyl, R 7 : H or NH 2 , R 8 : H, C 1 –C 6 alkyl, or a pharmaceutically acceptable salt or tautomeric form thereof.