Patent ID: 7015345

Claim:
A compound represented by the following formula (1) or a salt thereof: wherein R 1 represents a C 1-12 alkyl group which may be substituted with one or more substituents selected from the group consisting of a halogen atom, a lower alkoxyl group, and a phenyl group which may be substituted with one or more halogen atoms or a group represented by the following formula (1-1): wherein a is an integer from 0 to 5 and R 6 represents at least one substituent selected from the group consisting of a halogen atom, a lower alkyl group, a lower alkoxyl group, a lower alkylthio group, nitro group, a lower alkoxycarbonyl group, cyano group, trifluoromethyl group, trifluoromethoxy group, or a phenyloxy group, which may be the same or different, or represents a substituent selected from the group consisting of 1-naphthyl group, 2-naphthyl group, 5-indanyl group, 5,6,7,8-tetrahydronaphthalen-2-yl group, allyl group, 3-butenyl group, and 2-propynyl group, R 2 represents a C 2-12 alkyl group which may be substituted with one or more substituents selected from the group consisting of a lower alkoxyl group, an aryloxy group, an aralkyloxy group, a lower alkylthio group, an arylthio group, an aralkylthio group, and a phenyl group, wherein R 2 may be further substituted with one or more halogen atoms provided that R 2 , except for the methylene group in R 2 that binds to the nitrogen atom, may be substituted with one or more halogen atoms, b is an integer from 0 to 4 and R 3 is at least one substituent selected from the group consisting of a halogen atom, a lower alkyl group, or a lower alkoxyl group, which may be the same or different, R 4 represents a lower alkyl group, R 5 represents hydrogen atom or a lower alkyl group, n is an integer from 2 to 4, and X represents —NH— or —O—.