Patent ID: 8168638

Claim:
A pyrazinecarboxamide derivative, or its salts, represented by formula (I): wherein: X is (i) a halogen atom, or (ii) a (C 1 -C 3 )alkyl group which may be substituted with a halogen atom(s); Y is (i) a hydrogen or halogen atom, or (ii) a (C 1 -C 3 )alkyl or (C 1 -C 3 )alkoxy group; R is (i) a hydrogen or halogen atom, (ii) a cyano group, (iii) a (C 1 -C 6 )alkyl group which may be substituted with a halogen atom(s), (iv) a (C 1 -C 6 )alkoxy group which may be substituted with a halogen atom(s), (v) a (C 2 -C 6 )alkenyloxy group which may be substituted with a halogen atom(s), (vi) a (C 2 -C 6 )alkynyloxy group which may be substituted with a halogen atom(s), (vii) a (C 1 -C 6 )alkylthio group which may be substituted with a halogen atom(s), (viii) a (C 1 -C 6 )alkylsulfinyl group which may be substituted with a halogen atom(s), (ix) a (C 1 -C 6 )alkylsulfonyl group which may be substituted with a halogen atom(s), (x) a (C 1 -C 6 )alkoxycarbonyl group, (xi) a phenyl group which may be substituted with a substituent(s) Z, (xii) a phenoxy group which may be substituted with a substituent(s) Z, (xiii) a pyridyloxy group which may be substituted with a substituent(s) Z, or (xiv) a pyrimidyloxy group which may be substituted with a substituent(s) Z; n is an integer of 1 to 5; wherein, when n is an integer of 2 to 5, R may be the same or different and two adjacent Rs in formula (I) can be taken together to represent (i) a (C 3 -C 5 )alkylene group which may be substituted with a substituent(s) Z, (ii) a (C 2 -C 4 )alkyleneoxy group which may be substituted with a substituent(s) Z, (iii) a (C 2 -C 4 )alkenyleneoxy group which may be substituted with a substituent(s) Z, or (iv) a (C 1 -C 3 )alkylenedioxy group which may be substituted with a substituent(s) Z; and Z is (i) a hydrogen or halogen atom, (ii) a cyano group, (iii) a (C 1 -C 6 )alkyl group which may be substituted with a halogen atom(s), (iv) a (C 2 -C 6 )alkenyl group which may be substituted with a halogen atom(s), (v) a (C 2 -C 6 )alkynyl group which may be substituted with a halogen atom(s), (vi) a (C 1 -C 6 )alkoxy group which may be substituted with a halogen atom(s), (vii) a (C 2 -C 6 )alkenyloxy group which may be substituted with a halogen atom(s), (viii) a (C 2 -C 6 )alkynyloxy group which may be substituted with a halogen atom(s), (ix) a (C 1 -C 6 )alkylthio group which may be substituted with a halogen atom(s), (x) a (C 1 -C 6 )alkylsulfinyl group which may be substituted with a halogen atom(s), (xi) a (C 1 -C 6 )alkylsulfonyl group which may be substituted with a halogen atom(s), or (xii) a (C 1 -C 6 )alkoxycarbonyl, (C 1 -C 6 )alkoxyimino(C 1 -C 3 )alkyl or carbamoyl group, and when a plural number of Zs are present, the Zs may be the same or different.