Patent ID: 7807719

Claim:
A compound of Formula I and a salt thereof: wherein: R 1 , R 2 and R 3 are each independently selected from H, OH, C 1-6 alkyl, OC 1-6 alkyl, OC(O)C 1-6 alkyl, C(O)OC 1-6 alkyl, NH 2 , NH—C 1 alkyl, N(C 1-6 alkyl)(C 1-6 alkyl), C(O)NHC 1-6 alkyl, C(O)N(C 1-6 alkyl) (C 1-6 alkyl), SH, SC 1-6 alkyl, NO 2 , CF 3 , OCF 3 and halogen; R 4 is selected from C(X)R 5 , SO 2 Ar, NH 2 , NHC 1-6 alkyl, N(C 1-6 alkyl)(C 1-6 alkyl), P(O)(OH) 2 , P(O)(OC 1-6 alkyl) 2 , and C(NH 2 )═C(CN) 2 ; R 5 is selected from NH 2 , OH, OC 1-6 alkyl, OC 1-3 alkyl, OAr, NHAr, NH(CH 2 ) n Ar, NH(CH 2 ) n OH, (CH 2 ) n OC 1-6 alkyl, C 1-6 alkyl, NHNH 2 , NHC(O)NH 2 , NHC(O)C 1-6 alkoxy, N-morpholino and N-pyrrolidino; Ar is an aromatic or heteroaromatic group, unsubstituted or substituted with 1-4 substituents independently selected from OH, C 1-6 alkyl, C 1-3 alkylenedioxy, NH 2 , NH—C 1-6 alkyl, N(C 1-6 alkyl)(C 1-6 alkyl), SH, SC 1-6 alkyl, NO 2 , CF 3 , OCF 3 and halo; Hal is selected from Cl, Br, and I; X is selected from O and S; Y is selected from (CH 2 CH 2 O) p ; n is 1 to 6; and p is 1 to 3.