Patent ID: 8354429

Claim:
A compound of the formula (I): wherein: R 4 is Het, wherein Het is optionally substituted with 1 to 3 substituents each independently selected from halo, (C 1-6 )alkyl, (C 2-6 )alkenyl, (C 1-6 )haloalkyl, (C 3-7 )cycloalkyl, —OH, —O(C 1-6 )alkyl, —SH, —S(C 1-6 )alkyl, —NH 2 , —NH(C 1-6 )alkyl and —N((C 1-6 )alkyl) 2 , wherein (C 1-6 )alkyl is optionally substituted with hydroxy, cyano or oxo; R 6 and R 7 are each independently selected from H, halo, (C 1-6 )alkyl and (C 1-6 )haloalkyl; and Het is a 4- to 7-membered saturated, unsaturated or aromatic heterocycle having 1 to 4 heteroatoms each independently selected from O, N and S, or a 7- to 14-membered saturated, unsaturated or aromatic heteropolycycle having wherever possible 1 to 5 heteroatoms, each independently selected from O, N and S; or a salt thereof.