发明人杨光,冯建国,胡光. "Method for the Synthesis of 8-Methoxy-2-oxo-2H-chromene-3-carboxamide compound with 1-methylthiourea (1:1)" [P]. 中国发明专利, 专利号 CN 113134416 A, 授权公告日 2015-11-11.
发明人陈志强,王建平,沈红梅. "A Process for Preparing High-Purity 8-Methoxy-2-oxo-2H-chromene-3-carboxamide compound with 1-methylthiourea (1:1)" [P]. 中国发明专利, 专利号 CN 111225933 A, 授权公告日 2019-12-12.
参考文献 Literature
Smith J A, Johnson M B. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Nat. Prod., 2017, 1420, (5), 306-329.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Chromatogr. A, 2011, 1795, (10), 3129-3138.
Brown R C, Davis S M. "Identification and Structural Characterization of a Novel Degradation Product of 8-Methoxy-2-oxo-2H-chromene-3-carboxamide compound with 1-methylthiourea (1:1) Using HRMS and NMR". J. Agric. Food Chem., 2011, 504, (3), 8362-8384.