Patent ID: 7709677

Claim:
A compound of Formula (IV): or a salt thereof wherein: R 2 represents hydrogen or C 1-6 alkyl; R 3 represents hydrogen or C 1-6 alkyl; L represents halogen; R 4 represents a group (W): wherein A represents an aryl; R 5 represents cyano or —CO 2 R 8 ; R 6 and R 7 independently represent hydrogen, C 1-6 alkyl, —CO 2 R 8 , cyano, halogen, trifluoromethyl or C 1-6 alkoxy; each R 12 independently represents substituents selected from: C 1-6 alkyl, halogen, trifluoromethyl and C 1-6 alkoxy, and n represents an integer from 0-4; R 8 and R 9 independently represent C 1-6 alkyl; and R 11 represents C 1-6 alkyl or aryl optionally substituted by C 1-6 alkyl or halogen.