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公开(公告)号：US10316055B2
公开(公告)日：2019-06-11
申请号：US15774697
申请日：2016-11-28
Applicant: DSM IP Assets B.V.
Inventor： Jan Schuetz , Ralph Waechter
Abstract: The present invention relates to a method of purification of compound of formula (I) which comprises the step of crystallization of compound of formula (I) from a composition comprising the compound of formula (I) and the compound of formula (II) and a specific solvent system containing ethanol, 1-propanol, 2-propanol, 2-methyl-1-propanol, 1-butanol or 2-butanol.
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