Anderson J P, Davis P L, Mueller T. "一种的合成方法" [P]. US Patent, US 9967242 B2, 2016-03-13.
发明人李文辉,赵玉洁,何建平. "Method for the Synthesis of 7-[(2S)-2-[(Methoxycarbonyl)amino]-3-methyl-1-oxobutyl]-1,4-dithia-7-azaspiro[4.4]nonane-8-carboxylic acid" [P]. 中国发明专利, 专利号 CN 112202822 B, 授权公告日 2020-11-10.
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". Molecules, 2021, 770, 373-395.
Yang F, Sun W, Liu J. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Talanta, 2020, 192, 8203-8219.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of 7-[(2S)-2-[(Methoxycarbonyl)amino]-3-methyl-1-oxobutyl]-1,4-dithia-7-azaspiro[4.4]nonane-8-carboxylic acid Using HRMS and NMR". Food Chem., 2011, 2058, (5), 6723-6741.