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发明人张德明,高志强,刘建华. "Method for the Synthesis of 6-Bromo-5',5'-dimethyl-4',5'-dihydro-2'H-spiro[benzo[b][1,4]oxazine-2,3'-furan]-3(4H)-one" [P]. 中国发明专利, 专利号 CN 117994681 A, 授权公告日 2015-09-27.
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