发明人胡光,罗永刚,徐明华. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 113130374 A, 授权公告日 2015-09-24.
发明人徐明华,刘建华,赵玉洁. "Method for the Synthesis of 4-Ethyl-3,4-dihydro-3-oxo-2H-1,4-benzoxazine-6-carbonitrile" [P]. 中国发明专利, 专利号 CN 112843138 B, 授权公告日 2024-04-21.
发明人陈志强,郑宇鹏,冯建国. "A Process for Preparing High-Purity 4-Ethyl-3,4-dihydro-3-oxo-2H-1,4-benzoxazine-6-carbonitrile" [P]. 中国发明专利, 专利号 CN 112717842 A, 授权公告日 2024-12-05.
参考文献 Literature
Garcia M, Rodriguez P. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Sep. Sci., 2024, 2346, 7440-7451.
Kowalski T, Nowak Z. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chromatographia, 2019, 1437, (4), 3789-3809.
Smith J A, Johnson M B. "Identification and Structural Characterization of a Novel Degradation Product of 4-Ethyl-3,4-dihydro-3-oxo-2H-1,4-benzoxazine-6-carbonitrile Using HRMS and NMR". Anal. Methods, 2014, 114, (9), 9215-9232.
Zhang Y, Li Q, Chen T. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Nat. Prod., 2016, 1645, 6022-6037.