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Anderson J P, Chen K W, Patel M V. "Method for the Synthesis of Methyl 2-(4-chlorophenyl)-7-hydroxy-3-oxo-2,3-dihydrothieno[3,2-c]pyridazine-6-carboxylate" [P]. US Patent, US 10076941 B2, 2017-08-21.
发明人高志强,郑宇鹏,马晓峰. "A Process for Preparing High-Purity Methyl 2-(4-chlorophenyl)-7-hydroxy-3-oxo-2,3-dihydrothieno[3,2-c]pyridazine-6-carboxylate" [P]. 中国发明专利, 专利号 CN 113061171 B, 授权公告日 2024-03-17.
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