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发明人罗永刚,何建平,王建平. "Method for the Synthesis of Ethyl 6-oxo-4,5,6,7-tetrahydro-1H-indazole-3-carboxylate" [P]. 中国发明专利, 专利号 CN 111289211 A, 授权公告日 2017-07-19.
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