FIELD: chemistry.
SUBSTANCE: invention relates to crystal A and crystal B of acetonitrile of the compound represented by formula I, pharmaceutical compositions based on them, their use for the preparation of a medicament for the treatment or prevention of Janus kinase-mediated disease.
EFFECT: crystal A and crystal B of the compound represented by formula I have high purity and good stability and are suitable for industrial production.
13 cl, 6 dwg, 6 tbl, 5 ex
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