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Nielsen H, Björnsson E, Nowak P. "A Process for Preparing High-Purity 2-((5-Cyano-6-methyl-2-oxo-1,2-dihydropyrimidin-4-yl)thio)-N-(furan-2-ylmethyl)acetamide" [P]. European Patent, EP 3791490 A1, 2016-07-14.
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