发明人钱学锋,罗永刚,张德明. "Method for the Synthesis of 4-(3-Methylbenzoyl)-8-propyl-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 108939755 A, 授权公告日 2015-01-28.
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