Jørgensen K, Björnsson E, Lefèvre J P. "一种的合成方法" [P]. European Patent, EP 3230728 A1, 2017-06-09.
Kumar R, Fischer A B, Williams B T. "Method for the Synthesis of (E)-4-(But-2-en-1-yl)-3-hydroxy-5-methoxybenzoic acid" [P]. US Patent, US 11110808 B2, 2018-09-13.
发明人郑宇鹏,郭海燕,罗永刚. "A Process for Preparing High-Purity (E)-4-(But-2-en-1-yl)-3-hydroxy-5-methoxybenzoic acid" [P]. 中国发明专利, 专利号 CN 109507671 B, 授权公告日 2023-05-23.
参考文献 Literature
Smith J A, Johnson M B. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chem., 2013, 485, (2), 1179-1197.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2015, 1712, 7426-7450.