发明人钱学锋,李文辉,林芳. "Method for the Synthesis of Ethyl 4-oxo-1,4-dihydropyrimido[1,2-b]indazole-2-carboxylate" [P]. 中国发明专利, 专利号 CN 112086040 B, 授权公告日 2025-01-10.
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