发明人钱学锋,徐明华,高志强. "Method for the Synthesis of 5-((Difluoromethoxy)methyl)-6,7-dihydro-5H-pyrazolo[5,1-b][1,3]oxazine-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 110892650 A, 授权公告日 2019-04-23.
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