发明人马晓峰,沈红梅,张德明. "Method for the Synthesis of 6,7-Dihydro-[1,4]oxathiino[2,3-c]pyridazine-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 112219309 B, 授权公告日 2020-10-16.
发明人王建平,韩伟,马晓峰. "A Process for Preparing High-Purity 6,7-Dihydro-[1,4]oxathiino[2,3-c]pyridazine-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109520462 A, 授权公告日 2015-12-14.
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