FIELD: chemistry.
SUBSTANCE: invention concerns levorotatory enantiomer for compound of the formula 
(B) and its pharmaceutically acceptable salts, where R1 is methyl, X is -COOMe; and levorotatory enantiomer for compound of the formula (B) and its pharmaceutically acceptable salts, where R1 is methyl, X is -COOEt. Additionally invention concerns methods of obtaining indicated enantiomers by asymmetrical hydration of respective source compounds in the form of Z and E isomers.
EFFECT: intermediary compounds for obtainment of levetiracetam medicine.
4 cl, 4 tbl, 8 ex
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