Patent ID: 7608563

Claim:
A compound represented by the formula: wherein R 1 is a chlorine atom or a bromine atom, R 2 is a hydrogen atom, R 3 , R 4 , R 5 , R 6 and R 7 each independently represent a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, a C 1 to C 4 alkyl group, a C 3 to C 4 cycloalkyl group, a cyano group, a C 2 to C 3 alkoxycarbonyl group, a nitro group, a C 1 to C 3 alkoxy group or a trifluoromethoxy group, or R 3 , R 4 , R 5 , R 6 and R 7 are a group represented by —CH 2 CH 2 CH 2 —, —CH(CH 3 )CH 2 CH 2 —, OCH 2 CH 2 , —OCH═CH— or which is formed by two adjacent members of R 3 , R 4 , R 5 , R 6 and R 7 , provided that R 3 is not a hydrogen atom, and m and n are both zero, a salt thereof or an ester thereof.