发明人韩伟,赵玉洁,何建平. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 113382063 A, 授权公告日 2024-03-17.
发明人冯建国,徐明华,钱学锋. "Method for the Synthesis of Ethyl 4-[(4-methoxybenzyl)amino]-3-methyl-1H-pyrazolo[3,4-b]pyridine-5-carboxylate" [P]. 中国发明专利, 专利号 CN 108093630 B, 授权公告日 2022-10-09.
发明人刘建华,韩伟,王建平. "A Process for Preparing High-Purity Ethyl 4-[(4-methoxybenzyl)amino]-3-methyl-1H-pyrazolo[3,4-b]pyridine-5-carboxylate" [P]. 中国发明专利, 专利号 CN 109672625 B, 授权公告日 2022-10-23.
参考文献 Literature
Chen X Y, Liu M, Zhao W Q. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Molecules, 2014, 493, (10), 9343-9366.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Nat. Prod., 2023, 1627, 4744-4759.
Yamamoto K, Tanaka H, Suzuki T. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 4-[(4-methoxybenzyl)amino]-3-methyl-1H-pyrazolo[3,4-b]pyridine-5-carboxylate Using HRMS and NMR". J. Sep. Sci., 2019, 553, (12), 2451-2458.