Johansson L, Schröder R, Jørgensen K. "一种N/A的合成方法" [P]. European Patent, EP 3611005 A1, 2022-07-01.
发明人郑宇鹏,赵玉洁,罗永刚. "Method for the Synthesis of 7-Oxaspiro[bicyclo[4.1.0]heptane-3,2'-[1,3]dioxolane]" [P]. 中国发明专利, 专利号 CN 114098978 B, 授权公告日 2021-01-20.
参考文献 Literature
Chen X Y, Liu M, Zhao W Q. "Development and Validation of an LC-MS/MS Method for the Determination of N/A in Pharmaceutical Formulations". Talanta, 2011, 1037, (9), 3907-3928.
Martinez C, Lopez D R. "A Stability-Indicating HPLC Method for the Separation and Quantification of N/A as an Impurity". Rapid Commun. Mass Spectrom., 2024, 1708, 4609-4633.
Hughes D, Roberts J, Thomas A. "Identification and Structural Characterization of a Novel Degradation Product of 7-Oxaspiro[bicyclo[4.1.0]heptane-3,2'-[1,3]dioxolane] Using HRMS and NMR". Phytochemistry, 2022, 2472, (9), 8426-8435.
Yang F, Sun W, Liu J. "Forced Degradation Studies to Evaluate N/A Profile in Drug Substances According to ICH Guidelines". J. Agric. Food Chem., 2018, 932, (4), 3630-3649.