O'Brien P Q, Fischer A B, Park J H. "一种的合成方法" [P]. US Patent, US 10545370 B2, 2022-09-18.
Fischer A B, Johnson M A, Klinger H. "Method for the Synthesis of 2-(4-Methoxyphenyl)-2'-oxospiro[cyclopropane-1,3'-indoline]-5'-carboxylic acid" [P]. US Patent, US 9275548 B2, 2020-10-18.
Kowalski A, Sørensen M, Johansson L. "A Process for Preparing High-Purity 2-(4-Methoxyphenyl)-2'-oxospiro[cyclopropane-1,3'-indoline]-5'-carboxylic acid" [P]. European Patent, EP 3712274 A1, 2020-08-15.
参考文献 Literature
Zhang Y, Li Q, Chen T. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chromatographia, 2022, 314, (4), 8151-8167.
Kumar A, Sharma P, Patel R S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Rapid Commun. Mass Spectrom., 2023, 1794, (10), 562-568.
Wang L, Li J, Zhang H. "Identification and Structural Characterization of a Novel Degradation Product of 2-(4-Methoxyphenyl)-2'-oxospiro[cyclopropane-1,3'-indoline]-5'-carboxylic acid Using HRMS and NMR". Food Chem., 2019, 2288, (6), 932-957.