FIELD: organic chemistry, more particularly pharmaceutical industry for preparing Aminalon drug. SUBSTANCE: method comprises preparing γ-aminobutyric acid potassium acid from α-pyrrolidone, isolating free γ-aminobutyric acid by reaction with acetic acid and by crystallization and recrystallization from butanol. Yield of the desired product is 88.4%. EFFECT: increased yield of the desired product. 2 cl, 2 ex, 1 tbl
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