发明人张德明,钱学锋,李文辉. "Method for the Synthesis of (S)-Octahydro-2H-pyrido[1,2-a]pyrazine oxalate" [P]. 中国发明专利, 专利号 CN 116316222 A, 授权公告日 2015-01-11.
发明人高志强,郑宇鹏,李文辉. "A Process for Preparing High-Purity (S)-Octahydro-2H-pyrido[1,2-a]pyrazine oxalate" [P]. 中国发明专利, 专利号 CN 108666086 A, 授权公告日 2017-11-11.
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