Schröder R, Johansson L, Björnsson E. "一种的合成方法" [P]. European Patent, EP 3275722 A1, 2025-06-11.
发明人周伟,罗永刚,钱学锋. "Method for the Synthesis of 5'H,7'H-spiro[cyclopropane-1,6'-pyrazolo[5,1-b][1,3]oxazin]-2'-amine" [P]. 中国发明专利, 专利号 CN 112818450 A, 授权公告日 2022-12-09.
发明人林芳,钱学锋,罗永刚. "A Process for Preparing High-Purity 5'H,7'H-spiro[cyclopropane-1,6'-pyrazolo[5,1-b][1,3]oxazin]-2'-amine" [P]. 中国发明专利, 专利号 CN 109115813 A, 授权公告日 2021-03-06.
参考文献 Literature
Mueller T, Schmidt R K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Molecules, 2021, 714, (6), 6000-6014.
Xu M, Hu Y, Zhou D. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chemosphere, 2019, 1956, (5), 4548-4570.
Martinez C, Lopez D R. "Identification and Structural Characterization of a Novel Degradation Product of 5'H,7'H-spiro[cyclopropane-1,6'-pyrazolo[5,1-b][1,3]oxazin]-2'-amine Using HRMS and NMR". Phytochemistry, 2017, 1352, (7), 3680-3700.