发明人刘建华,沈红梅,张德明. "Method for the Synthesis of 6,7-Dihydro-4H-pyrano[3,4-d]oxazole-2-carboxylic acid, lithium salt" [P]. 中国发明专利, 专利号 CN 115946786 B, 授权公告日 2022-11-19.
发明人郑宇鹏,高志强,钱学锋. "A Process for Preparing High-Purity 6,7-Dihydro-4H-pyrano[3,4-d]oxazole-2-carboxylic acid, lithium salt" [P]. 中国发明专利, 专利号 CN 114821075 A, 授权公告日 2018-07-19.
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