Patent ID: 7022855

Claim:
A compound represented by formula (I) or a salt thereof: wherein R 1 represents alkyl having 1 to 6 carbon atoms optionally substituted by a halogen atom or cyano; alkenyl having 2 to 6 carbon atoms optionally substituted by a halogen atom or cyano; alkynyl having 2 to 6 carbon atoms optionally substituted by a halogen atom or cyano; group —O—R 5 wherein R 5 represents alkyl having 1 to 6 carbon atoms optionally substituted by a halogen atom or cyano, alkenyl having 2 to 6 carbon atoms optionally substituted by a halogen atom or cyano, or alkynyl having 2 to 6 carbon atoms optionally substituted by a halogen atom or cyano; or group —S—R 5 wherein R 5 is as defined above, R 2 represents alkyl having 1 to 4 carbon atoms optionally substituted by a halogen atom, any one of R 3 and R 4 represents a hydrogen atom and the other represents a fluorine atom, a chlorine atom, a bromine atom, or —CF 3 , and X represents a fluorine atom or a chlorine atom.