发明人张德明,陈志强,韩伟. "Method for the Synthesis of 2,5-Dimethyl-7-oxo-4,7-dihydropyrazolo[1,5-a]pyrimidine-3-carbonitrile" [P]. 中国发明专利, 专利号 CN 109812404 B, 授权公告日 2021-05-10.
参考文献 Literature
Xu M, Hu Y, Zhou D. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Nat. Prod., 2011, 459, (3), 4309-4325.
Garcia M, Rodriguez P. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Food Chem., 2011, 1546, (9), 7798-7814.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of 2,5-Dimethyl-7-oxo-4,7-dihydropyrazolo[1,5-a]pyrimidine-3-carbonitrile Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2022, 363, 7330-7338.
Jensen P, Larsen A M, Olsen K. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Methods, 2015, 2160, (11), 3224-3230.