Pyrazine compound

A compound represented by formula (M-3):

• [wherein
• A1 represents a nitrogen atom or a CR4;
• R4 represents a hydrogen atom, a OR27, a NR27R28, a cyano group, a nitro group, or a halogen atom;
• R27 and R28 represent independently of each other, a hydrogen atom, or a C1-C6 alkyl group optionally having one or more halogen atoms;
• R2 represents a C1-C6 alkyl group optionally having one or more halogen atoms, a cyclopropylmethyl group, or a cyclopropyl group;
• q represents 0, 1, 2, or 3;
• R3 represents independently of each other a C1-C6 chain hydrocarbon group optionally having one or more substituents selected from Group B, a phenyl group optionally having one or more substituents selected from Group D, a 5 or 6 membered aromatic heterocyclic group optionally having one or more substituents selected from Group D, a OR12, a NR11R12, a NR11aR12a, a NR29NR11R12, a NR29OR11, a NR11C(O)R13, a NR29NR11C(O)R13, a NR11C(O)OR14, a NR29NR11C(O)OR14, a NR11C(O)NR15R16, a NR24NR11C(O)NR15R16, a N═CHNR15R16, a N═S(O)xR15R16, a S(O)yR15, a C(O)OR17, a C(O)NR11R12, a cyano group, a nitro group, or a halogen atom, and when q is 2 or 3, a plurality of R3 may be identical or different;
• R11, R17, R18, R19, R24 and R29 represent independently of each other a hydrogen atom, or a C1-C6 chain hydrocarbon group optionally having one or more halogen atoms;
• R12 represents a C1-C6 chain hydrocarbon group optionally having one or more halogen atoms, a C1-C6 alkyl group having one substituent selected from Group F, or a S(O)2R23;
• R23 represents a C1-C6 chain hydrocarbon group optionally having one or more halogen atoms, or a phenyl group optionally having one or more substituents selected from Group D;
• R11a and R12a combine together with a nitrogen atom to which they are attached to form a 3 to 7 membered nonaromatic heterocyclic group optionally having one or more substituents selected from Group E {the 3 to 7 membered nonaromatic heterocyclic group represents aziridine, azetidine, pyrrolidine, imidazoline, imidazolidine, piperidine, tetrahydropyrimidine, hexahydropyrimidine, piperazine, azepane, oxazolidine, isooxazolidine, 1,3-oxazinane, morpholine, 1,4-oxazepane, thiazolidine, isothiazolidine, 1,3-thiazinane, thiomorpholine, or 1,4-thiazepane};
• R13 represents a hydrogen atom, a C1-C6 chain hydrocarbon group optionally having one or more halogen atoms, a C3-C7 cycloalkyl group optionally having one or more halogen atoms, a (C3-C6 cycloalkyl)C1-C3 alkyl group optionally having one or more halogen atoms, a phenyl group optionally having one or more substituents selected from Group D, or a 5 or 6 membered aromatic heterocyclic group optionally having one or more substituents selected from Group D;
• R14 represents a C1-C6 chain hydrocarbon group optionally having one or more halogen atoms, a C3-C7 cycloalkyl group optionally having one or more halogen atoms, a (C3-C6 cycloalkyl)C1-C3 alkyl group optionally having one or more halogen atoms, or a phenylC1-C3 alkyl group {the phenyl moiety in the phenylC1-C3 alkyl group may optionally have one or more substituents selected from Group D};
• R15 and R16 represent independently of each other, a C1-C6 alkyl group optionally having one or more halogen atoms;
• n represents 0, 1, or 2;
• p represents 0, 1, or 2;
• and
• R6 represents independently of each other a C1-C6 alkyl group optionally having one or more halogen atoms, a OR18, a NR18R19, a cyano group, a nitro group, or a halogen atom, and when p is 2, a plurality of R6 may be identical or different;
• Group B:
• a group consisting of a C1-C6 alkoxy group optionally having one or more halogen atoms, a C3-C6 alkenyloxy group optionally having one or more halogen atoms, a C3-C6 alkynyloxy group optionally having one or more halogen atoms, a C1-C6 alkylsulfanyl group optionally having one or more halogen atoms, a C1-C6 alkylsulfinyl group optionally having one or more halogen atoms, a C1-C6 alkylsulfonyl group optionally having one or more halogen atoms, a C3-C6 cycloalkyl group optionally having one or more halogen atoms, a cyano group, a hydroxy group, and a halogen atom;
• Group C:
• a group consisting of a C1-C6 chain hydrocarbon group optionally having one or more halogen atoms, a C1-C6 alkoxy group optionally having one or more halogen atoms, a C3-C6 alkenyloxy group optionally having one or more halogen atoms, a C3-C6 alkynyloxy group optionally having one or more halogen atoms, and a halogen atom;
• Group D:
• a group consisting of a C1-C6 chain hydrocarbon group optionally having one or more halogen atoms, a hydroxy group, a C1-C6 alkoxy group optionally having one or more halogen atoms, a C3-C6 alkenyloxy group optionally having one or more halogen atoms, a C3-C6 alkynyloxy group optionally having one or more halogen atoms, a sulfanyl group, a C1-C6 alkylsulfanyl group optionally having one or more halogen atoms, a C1-C6 alkylsulfinyl group optionally having one or more halogen atoms, a C1-C6 alkylsulfonyl group optionally having one or more halogen atoms, an amino group, a NHR21, a NR21R22, a C(O)R21, a OC(O)R21, a C(O)OR21, a cyano group, a nitro group, and a halogen atom {R21 and R22 represent independently of each other a C1-C6 alkyl group optionally having one or more halogen atoms};
• Group E:
• a group consisting of a C1-C6 chain hydrocarbon group optionally having one or more halogen atoms, a C1-C6 alkoxy group optionally having one or more halogen atoms, a C3-C6 alkenyloxy group optionally having one or more halogen atoms, a C3-C6 alkynyloxy group optionally having one or more halogen atoms, a halogen atom, an oxo group, a hydroxy group, a cyano group, and a nitro group;
• Group F:
• a group consisting of a C1-C6 alkoxy group optionally having one or more halogen atoms, an amino group, a NHR21, a NR21R22, a cyano group, a phenyl group optionally having one or more substituents selected from Group D, a 5 or 6 membered aromatic heterocyclic group optionally having one or more substituents selected from Group D, a C3-C7 cycloalkyl group optionally having one or more halogen atoms, and a 3 to 7 membered nonaromatic heterocyclic group optionally having one or more substituents selected from Group C.].