发明人郭海燕,罗永刚,冯建国. "Method for the Synthesis of tert-Butyl 7-oxo-5-azaspiro[2.5]octane-5-carboxylate" [P]. 中国发明专利, 专利号 CN 108500317 B, 授权公告日 2017-08-23.
发明人钱学锋,徐明华,王建平. "A Process for Preparing High-Purity tert-Butyl 7-oxo-5-azaspiro[2.5]octane-5-carboxylate" [P]. 中国发明专利, 专利号 CN 114796038 A, 授权公告日 2025-08-12.
参考文献 Literature
Yamamoto K, Tanaka H, Suzuki T. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2011, 1401, (5), 2501-2507.
Mueller T, Schmidt R K. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Agric. Food Chem., 2013, 1866, (10), 1793-1806.
Mueller T, Schmidt R K. "Identification and Structural Characterization of a Novel Degradation Product of tert-Butyl 7-oxo-5-azaspiro[2.5]octane-5-carboxylate Using HRMS and NMR". Sci. Total Environ., 2011, 2219, (8), 1046-1072.