Fischer A B, Thompson G K, Hughes D C. "一种的合成方法" [P]. US Patent, US 11270922 B2, 2019-02-12.
Klinger H, Mueller T, Anderson J P. "Method for the Synthesis of 9H-Fluorene-9-carboxylic Acid" [P]. US Patent, US 10967236 B2, 2023-06-21.
发明人马晓峰,王建平,徐明华. "A Process for Preparing High-Purity 9H-Fluorene-9-carboxylic Acid" [P]. 中国发明专利, 专利号 CN 108166735 A, 授权公告日 2025-04-24.
参考文献 Literature
Kowalski T, Nowak Z. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chromatographia, 2021, 293, 8153-8176.
Xu M, Hu Y, Zhou D. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chemosphere, 2021, 1146, 1138-1163.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of 9H-Fluorene-9-carboxylic Acid Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2024, 1201, (4), 1994-2019.