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Mueller T C, Jørgensen K, Nowak P. "Method for the Synthesis of Methyl 3-{[(3-methyl-5-oxo-1-phenyl-1,5-dihydro-4H-pyrazol-4-yliden)methyl]amino}-2-thiophenecarboxylate" [P]. European Patent, EP 3016565 A1, 2019-09-26.
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