Patent ID: 7521560

Claim:
A compound according to any one of structural formulae (I)-(IV): and salts and N-oxides thereof, wherein: R 4 is selected from hydrogen, (C1-C6) alkyl, and —C(O)NR b R b ; R 6 is selected from hydrogen and halo; R 8 is selected from hydrogen and halo; R 9 is selected from hydrogen, halo, cyano, —C(O)OR b , and —C(O)NR b R b ; R 10 is selected from hydrogen, (C1-C6) alkyl, branched (C1-C6) alkyl, phenyl, para-(C1-C6)alkoxyphenyl, para-methoxyphenyl, 5-membered heteroaryl, and thienyl; and each R b is, independently of the others, selected from hydrogen and (C1-C6) alkyl, wherein alkyl refers to a saturated or unsaturated branched, straight chain or cyclic monovalent radical that is derived by the removal of one hydrogen atom from a single carbon of a parent alkane, alkene, or alkyne; with the proviso that at least one of R 4 , R 6 and R 8 is other than hydrogen.