Martínez F, Schröder R, Rossi M. "Method for the Synthesis of 2-(3,4-Dimethoxybenzylidene)-6-hydroxybenzofuran-3(2h)-one" [P]. European Patent, EP 3459234 A1, 2019-02-23.
发明人马晓峰,高志强,赵玉洁. "A Process for Preparing High-Purity 2-(3,4-Dimethoxybenzylidene)-6-hydroxybenzofuran-3(2h)-one" [P]. 中国发明专利, 专利号 CN 114494209 A, 授权公告日 2021-01-07.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Chromatogr. A, 2014, 2228, (11), 3513-3540.
Brown R C, Davis S M. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Molecules, 2022, 1099, 7924-7930.
Kim S H, Park J Y. "Identification and Structural Characterization of a Novel Degradation Product of 2-(3,4-Dimethoxybenzylidene)-6-hydroxybenzofuran-3(2h)-one Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2018, 2002, (2), 3261-3280.