Patent ID: 8236986

Claim:
A compound of formula (IV): in which R 3 and R 5 are each independently halogen, (C 1 -C 6 )-alkyl, (C 1 -C 6 )-haloalkyl, (C 1 -C 6 )-alkoxy, S(O) q —(C 1 -C 6 )-alkyl, (C 1 -C 6 )-alkylcarbonyl, —CO-aryl, cyano or nitro; or two adjacent R 5 groups form a —O—CH 2 CH 2 — moiety, R 4 is hydrogen, (C 1 -C 4 )-alkyl, (C 2 -C 4 )-alkenyl or (C 2 -C 4 )-alkynyl, n is an integer from 0 to 4, m is an integer from 0 to 5, and q is 0, 1 or 2; or a salt thereof.