Park J H, Mueller T, Stevens L M. "Method for the Synthesis of Ethyl 7-nitro-9-oxo-9H-fluorene-2-carboxylate" [P]. US Patent, US 11636351 B2, 2024-09-28.
发明人周伟,唐晓军,王建平. "A Process for Preparing High-Purity Ethyl 7-nitro-9-oxo-9H-fluorene-2-carboxylate" [P]. 中国发明专利, 专利号 CN 112515345 B, 授权公告日 2024-02-21.
参考文献 Literature
Kumar A, Sharma P, Patel R S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Rapid Commun. Mass Spectrom., 2022, 1868, 7647-7675.
Xu M, Hu Y, Zhou D. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chromatographia, 2025, 381, (7), 2053-2080.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 7-nitro-9-oxo-9H-fluorene-2-carboxylate Using HRMS and NMR". Phytochemistry, 2017, 995, (11), 7030-7050.