FIELD: chemistry.SUBSTANCE: invention relates to a compound of formula:Iwhere (a) X is N or CR8； (b) R1 is H, F, Cl, Br； (c) R2 is H； (d) R3 is H, F, Cl, Br； (e) R4 is H, F, Cl, Br, I, CN, substituted or unsubstituted C1-C6alkyl, substituted or unsubstituted C2-C6alkenyl, substituted or unsubstituted C6-aryl, SR9, where each of said R4, which is substituted, contains one or more substitutes selected from F, Cl, Br； (f) R5 is H, substituted or unsubstituted C1-C6alkyl, substituted or unsubstituted C2-C6alkenyl, C(=X1)R9, C(=X1)OR9, C1-C6alkylC6-aryl (where the aryl can be substituted or unsubstituted), R9X2C(=X1)R9, R9X2R9, C(=O)(C1-C6alkyl)S(O)n(C1-C6alkyl), C(=O)(C1-C6alkyl)C(=O)O(C1-C6alkyl), (C2-C6alkenyl)C(=O)O(C1-C6alkyl), SR9, R9S(O)nR9； where each of said R5, which is substituted, contains one substitute selected from F, Cl, Br, C3-C10cycloalkyl, OR9, optionally, R5 and R7 can be bonded to form a C3 cyclic system； (g) R6 is O, S, NR9； (h) R7 is substituted or unsubstituted C1-C6alkyl, substituted or unsubstituted C2-C6alkenyl, substituted or unsubstituted C1-C6alkoxy, substituted or unsubstituted C3-C10cycloalkyl, substituted or unsubstituted C6-aryl, substituted or unsubstituted C1-C20heterocyclyl, selected from thiazole, oxazole, isothiazole, thiophene, pyrroidine, furan, tetrahydrothiophene, pyridazine, piperdine, pyrazole, OR9, OR9S(O)nR9, C(=X1)R9, R9C(=X1)OR9, N(R9)2, N(R9)(R9S(O)nR9), SR9, R9S(O)nR9, C1-C6alkylC1-C20heterocyclyl (where the heterocyclyl is selected from triazole and pyrazole), C1-C6alkylS(=N-CN)(C1-C6alkyl), C1-C6alkylS(O)(=N-CN)(C1-C6alkyl), C1-C6alkylNH(C(=O)OC1-C6alkyl), C1-C6 alkylC(=O)OC1-C6alkyl, C1-C6alkyl(C6-aryl)NH(C(=O)OC1-C6alkyl), C1-C6alkyl(S-C1-C6alkyl)NH(C(=O)OC1-C6alkyl), C1-C6alkyl(S-C1-C6alkyl-C6-aryl)NH(C(=O)OC1-C6alkyl), C1-C6 alkyl(NHC(=O)OC1-C6alkylC6-aryl)NH(C(=O)OC1-C6alkyl), C1-C6alkyl(OC1-C6alkylC6-C20aryl)NH(C(=O)OC1-C6alkyl), C1-C6alkylNH(C1-C6alkyl)(C(=O)OC1-C6alkyl), C1-C6alkylNH(C1-C6alkyl), C1-C6alkylN(C1
