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Fischer A B, Stevens L M, Williams B T. "A Process for Preparing High-Purity 1-(4-Methyl-2-((4,6,8-trimethylquinazolin-2-yl)amino)pyrimidin-5-yl)ethan-1-one" [P]. US Patent, US 10759729 B2, 2022-10-27.
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