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发明人罗永刚,朱建伟,钱学锋. "A Process for Preparing High-Purity 8-Methyl-2,8-diazaspiro[4.5]decane dihydrochloride" [P]. 中国发明专利, 专利号 CN 109308300 B, 授权公告日 2017-10-28.
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