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Compounds of formula (I), wherein n is 1 or 3; R is -N(R1)R2 or -(O)mR3; m is 0 or 1; R1 and R2 are each independently of the other H or an organic radical or, together with the nitrogen atom carrying them, form a heterocyclic radical containing at least one nitrogen atom; R3 is an organic radical; R4 is H or C1-C6alkyl; and X is fluorine or chlorine; in free form or in salt form, can be used as agrochemical active ingredients and can be prepared in a manner known per se.