发明人林芳,马晓峰,孙丽萍. "Method for the Synthesis of Tert-butyl 1-isopropyl-1,4-dihydrospiro[indazole-5,4'-piperidine]-1'-carboxylate" [P]. 中国发明专利, 专利号 CN 113732357 B, 授权公告日 2021-07-04.
发明人罗永刚,钱学锋,杨光. "A Process for Preparing High-Purity Tert-butyl 1-isopropyl-1,4-dihydrospiro[indazole-5,4'-piperidine]-1'-carboxylate" [P]. 中国发明专利, 专利号 CN 116556056 A, 授权公告日 2024-02-01.
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". Anal. Chim. Acta, 2011, 805, 2640-2647.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Sci. Total Environ., 2011, 1391, (2), 8492-8500.
Smith J A, Johnson M B. "Identification and Structural Characterization of a Novel Degradation Product of Tert-butyl 1-isopropyl-1,4-dihydrospiro[indazole-5,4'-piperidine]-1'-carboxylate Using HRMS and NMR". Food Chem., 2017, 1371, 586-607.
Yang F, Sun W, Liu J. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Sep. Sci., 2014, 1140, 2838-2852.