Williams B T, Chen K W, Patel M V. "Method for the Synthesis of 8-Ethoxy-3,4-dihydro-2h-1-benzopyran-3-carboxylic acid" [P]. US Patent, US 9623973 B2, 2020-07-24.
发明人钱学锋,朱建伟,周伟. "A Process for Preparing High-Purity 8-Ethoxy-3,4-dihydro-2h-1-benzopyran-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 110397218 A, 授权公告日 2016-09-18.
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". Sci. Total Environ., 2018, 534, (12), 6891-6897.
Brown R C, Davis S M. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chemosphere, 2018, 1182, (3), 3460-3464.
Mueller T, Schmidt R K. "Identification and Structural Characterization of a Novel Degradation Product of 8-Ethoxy-3,4-dihydro-2h-1-benzopyran-3-carboxylic acid Using HRMS and NMR". J. Nat. Prod., 2013, 816, 4509-4513.