Roberts E F, Williams B T, Stevens L M. "Method for the Synthesis of (S)-5,7-Dihydroxy-2-(3-hydroxy-4,5-dimethoxyphenyl)-6-methoxychroman-4-one" [P]. US Patent, US 9485669 B2, 2020-01-07.
Jørgensen K, Nielsen H, Martínez F. "A Process for Preparing High-Purity (S)-5,7-Dihydroxy-2-(3-hydroxy-4,5-dimethoxyphenyl)-6-methoxychroman-4-one" [P]. European Patent, EP 3932913 A1, 2023-02-23.
参考文献 Literature
Wang L, Li J, Zhang H. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Molecules, 2011, 381, 2694-2716.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2016, 831, 2295-2324.
Yamamoto K, Tanaka H, Suzuki T. "Identification and Structural Characterization of a Novel Degradation Product of (S)-5,7-Dihydroxy-2-(3-hydroxy-4,5-dimethoxyphenyl)-6-methoxychroman-4-one Using HRMS and NMR". Chromatographia, 2021, 1366, (12), 4696-4723.
Brown R C, Davis S M. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chem., 2018, 592, 7012-7041.