O'Brien P Q, Hughes D C, Johnson M A. "一种的合成方法" [P]. US Patent, US 10223884 B2, 2020-06-03.
Nielsen H, Sørensen M, Schröder R. "Method for the Synthesis of Ethyl 2,7-dimethyl-4-oxo-4H-chromene-3-carboxylate" [P]. European Patent, EP 3987736 A1, 2021-09-12.
发明人黄志刚,孙丽萍,周伟. "A Process for Preparing High-Purity Ethyl 2,7-dimethyl-4-oxo-4H-chromene-3-carboxylate" [P]. 中国发明专利, 专利号 CN 117074350 B, 授权公告日 2023-08-23.
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". Food Chem., 2025, 206, (3), 5606-5609.
Martinez C, Lopez D R. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Environ. Sci. Technol., 2019, 1657, 417-422.