发明人黄志刚,郑宇鹏,冯建国. "Method for the Synthesis of 3,4-Dihydro-2,2-dimethyl-4-oxo-2H-1-benzopyran-6-carboxylic Acid" [P]. 中国发明专利, 专利号 CN 108201301 B, 授权公告日 2021-07-11.
发明人陈志强,何建平,徐明华. "A Process for Preparing High-Purity 3,4-Dihydro-2,2-dimethyl-4-oxo-2H-1-benzopyran-6-carboxylic Acid" [P]. 中国发明专利, 专利号 CN 110624051 B, 授权公告日 2018-02-06.
参考文献 Literature
Zhou X P, Huang L, Wu G. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Rapid Commun. Mass Spectrom., 2019, 1614, 5251-5258.
Xu M, Hu Y, Zhou D. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chem., 2015, 2332, (2), 4891-4907.
Zhou X P, Huang L, Wu G. "Identification and Structural Characterization of a Novel Degradation Product of 3,4-Dihydro-2,2-dimethyl-4-oxo-2H-1-benzopyran-6-carboxylic Acid Using HRMS and NMR". Chromatographia, 2023, 723, (7), 1623-1635.