发明人唐晓军,赵玉洁,钱学锋. "Method for the Synthesis of (4R)-tert-Butyl 4-methyl-8-oxohexahydro-1H-pyrido[1,2-a]pyrazine-2(6H)-carboxylate" [P]. 中国发明专利, 专利号 CN 111178530 A, 授权公告日 2019-06-15.
发明人何建平,韩伟,马晓峰. "A Process for Preparing High-Purity (4R)-tert-Butyl 4-methyl-8-oxohexahydro-1H-pyrido[1,2-a]pyrazine-2(6H)-carboxylate" [P]. 中国发明专利, 专利号 CN 114436395 A, 授权公告日 2020-06-15.
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