Patent ID: 6893650

Claim:
A compound of formula I and salts thereof wherein R 1 is hydrogen, optionally substituted alkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted carbocyclyl and optionally substituted heterocyclyl; each of R 2 and R 3 , which may be the same or different, is any group defined for R 1 , or together with the nitrogen to which they are attached form a ring, which may be substituted; R 4 is selected from the group consisting of alkyl, alkenyl, alkynyl, carbocyclyl and heterocyclyl, each of which may be substituted; m is 1; R 5 is any group defined for R 4 attached to the 5-position of the benzene ring M; R 6 is optionally substituted carbo- or heterocyclyl; and A is selected from the group consisting of a direct bond, —O—, —S—, —NR 9 —, —CHR 7 —, and —O—CHR 7 —; where R 9 is selected from the group consisting of alkyl, alkenyl and alkynyl, each of which may be substituted by a member of the group consisting of alkoxy, haloalkoxy, alkylthio, halogen and optionally substituted phenyl; where R 7 is selected from the group consisting of alkyl, alkenyl and alkynyl, which may be substituted by a member of the group consisting of alkoxy, haloalkoxy, alkylthio, halogen and phenyl optionally substituted by a member of the group consisting of alkyl, haloalkyl, alkoxy, haloalkoxy and alkylthio; where —A—R 6 is in the 4-position of the benzene ring M and the moiety depicted on the right side of linkage A is attached to R 6 , or —A—R 6 and R 5 together with benzene ring M form an optionally substituted fused ring system.