Patent ID: 8754008

Claim:
A compound of formula I: wherein R 1 is hydrogen or halogen; R 2 is halogen; R 3 is hydrogen or halogen; R 4 is hydrogen, C 1 -C 6 -alkyl, C 1 -C 6 -haloalkyl, C 3 -C 6 -cycloalkyl, C 3 -C 6 -alkenyl, C 3 -C 6 -haloalkenyl, C 3 -C 6 -alkynyl, C 3 -C 6 -haloalkynyl, C 1 -C 6 -alkoxy or C 3 -C 6 -cycloalkyl-C 1 -C 6 -alkyl; R 5 is hydrogen, NH 2 , C 1 -C 6 -alkyl or C 3 -C 6 -alkynyl; R 6 is hydrogen or C 1 -C 6 -alkyl; and W is O or S; and Z is O or S.