发明人朱建伟,林芳,唐晓军. "Method for the Synthesis of 6,8-Dichloro-3-methoxypyrimido[5,4-c]pyridazine" [P]. 中国发明专利, 专利号 CN 113229543 B, 授权公告日 2021-09-01.
发明人张德明,钱学锋,马晓峰. "A Process for Preparing High-Purity 6,8-Dichloro-3-methoxypyrimido[5,4-c]pyridazine" [P]. 中国发明专利, 专利号 CN 117820961 B, 授权公告日 2023-03-21.
参考文献 Literature
Kumar A, Sharma P, Patel R S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Sep. Sci., 2021, 702, 5821-5830.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chem., 2011, 790, 2490-2515.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of 6,8-Dichloro-3-methoxypyrimido[5,4-c]pyridazine Using HRMS and NMR". Anal. Methods, 2020, 636, (4), 4413-4438.