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发明人王建平,杨光,高志强. "A Process for Preparing High-Purity Spiro[benzo[d][1,3]oxazine-4,4'-piperidin]-2(1H)-one hydrochloride" [P]. 中国发明专利, 专利号 CN 114491521 A, 授权公告日 2023-10-01.
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