发明人郭海燕,刘建华,周伟. "Method for the Synthesis of Ethyl 2-((3-(4-methoxyphenyl)-[1,2,4]triazolo[4,3-b]pyridazin-6-yl)thio)butanoate" [P]. 中国发明专利, 专利号 CN 110037571 B, 授权公告日 2021-02-09.
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