FIELD: chemistry.
SUBSTANCE: invention relates to agriculture. Obtaining an insecticidal composition, having the first ratio of stereoisomers of a compound, which has the following structure: 
and heating of the composition for 4-72 hours at a temperature of 23-70°C with obtaining the second, different ratio of stereoisomers are realised.
EFFECT: invention makes it possible to increase the composition stability.
12 cl, 3 tbl, 9 ex
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