发明人陈志强,黄志刚,郑宇鹏. "一种N/A的合成方法" [P]. 中国发明专利, 专利号 CN 116148968 A, 授权公告日 2022-07-14.
发明人罗永刚,李文辉,周伟. "Method for the Synthesis of 6-Ethyltetrahydro-2H-pyran-2-one" [P]. 中国发明专利, 专利号 CN 116891339 B, 授权公告日 2019-06-07.
Hughes D C, Thompson G K, Schröder R. "A Process for Preparing High-Purity 6-Ethyltetrahydro-2H-pyran-2-one" [P]. US Patent, US 11680263 B2, 2025-08-02.
参考文献 Literature
Yang F, Sun W, Liu J. "Development and Validation of an LC-MS/MS Method for the Determination of N/A in Pharmaceutical Formulations". Anal. Chem., 2013, 1609, (3), 9048-9072.
Kim S H, Park J Y. "A Stability-Indicating HPLC Method for the Separation and Quantification of N/A as an Impurity". Chemosphere, 2018, 1135, (3), 9259-9266.
Fischer P, Wagner E. "Identification and Structural Characterization of a Novel Degradation Product of 6-Ethyltetrahydro-2H-pyran-2-one Using HRMS and NMR". J. Sep. Sci., 2021, 2202, (4), 7829-7848.