发明人马晓峰,徐明华,钱学锋. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 109080704 A, 授权公告日 2018-01-07.
O'Brien P Q, Schröder R, Klinger H. "Method for the Synthesis of 6,7-Dihydro-5H-pyrazolo[5,1-b][1,3]oxazine-2-carboxamide" [P]. US Patent, US 9910958 B2, 2022-12-23.
发明人林芳,郑宇鹏,罗永刚. "A Process for Preparing High-Purity 6,7-Dihydro-5H-pyrazolo[5,1-b][1,3]oxazine-2-carboxamide" [P]. 中国发明专利, 专利号 CN 110327874 A, 授权公告日 2018-01-09.
参考文献 Literature
Hughes D, Roberts J, Thomas A. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Sci. Total Environ., 2013, 536, 6555-6578.
Yang F, Sun W, Liu J. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Agric. Food Chem., 2016, 1195, (1), 2634-2637.
Hughes D, Roberts J, Thomas A. "Identification and Structural Characterization of a Novel Degradation Product of 6,7-Dihydro-5H-pyrazolo[5,1-b][1,3]oxazine-2-carboxamide Using HRMS and NMR". Chemosphere, 2015, 434, (3), 1716-1735.
Lee J H, Choi Y S. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Phytochemistry, 2018, 166, (4), 6569-6579.