发明人周伟,王建平,郭海燕. "Method for the Synthesis of 5-Oxa-2-azaspiro[3.4]oct-7-ene-2-carboxylic acid, 1,1-dimethylethyl ester" [P]. 中国发明专利, 专利号 CN 113773855 A, 授权公告日 2022-10-28.
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