Patent ID: 6914052

Claim:
A compound of the formula: X represents CR 7 R 8 ; Y represents CR 3 or N; R 1 represents H, F, Cl, Br, I, CH 3 or CF 3 ; R 2 represents NHR wherein R is H, lower straight or branched chain alkyl alkenyl or alkynyl consisting of 1 to 6 carbons; R 3 is H, lower straight or branched chain alkyl alkenyl or alkynyl consisting of 1 to 6 carbons, F, Cl, Br, or I; R 5 is H, F or OH; R 6 is H, F or OH; with the proviso that when either of R 5 and R 6 is OH, then R 6 or R 5 , respectively, cannot be either OH or F; R 7 and R 8 independently represent H; wherein R 11 is straight or branched alkyl; and R 10 represents CH 2 , O, or S, or a 5′-triphosphate derivative therof, phamaceutically acceptable complex or a pharmaceutically acceptable salt thereof.