FIELD: chemical industry. SUBSTANCE: described is bio β-crystalline form of cephyronsimansital prepared by treatment of well known crystalline or amorphous form of cephyronsimansetil with water or water-immiscible organic solvent or mixture thereof at temperatures from +20 to 100 C followed by cooling and isolation of crystalline product. EFFECT: improved properties of crystalline product. 5 cl, 4 dwg, 5 ex
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