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Jørgensen K, Nielsen H, Rossi M. "A Process for Preparing High-Purity Methyl 4-((2-ethyl-5,7-dimethylpyrazolo[1,5-a]pyrimidin-3-yl)methyl)benzoate" [P]. European Patent, EP 3557042 A1, 2023-11-13.
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