FIELD: organic chemistry. SUBSTANCE: invention proposes stable at storage crystalline form of pivaloylhydroxymethyl ester of carbopeneme derivative that is known as (1R, 5S, 6S)-2-[(4R)- -2-oxo-4-pyrrolidinylthio]-6-[(1R)-1-hydroxyethyl] -1-methyl-1- -carbapene-2-eme-3-carboxylic acid. EFFECT: improved quality of compound. 5 cl, 1 tbl, 1 dwg
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