Yamamoto T, Stevens L M, Thompson G K. "一种的合成方法" [P]. US Patent, US 11210917 B2, 2015-08-13.
Lefèvre J P, Rossi M, Sørensen M. "Method for the Synthesis of 2-({7-methyl-4-oxo-1h,2h,3h,4h-cyclopenta[c]chromen-9-yl}oxy)propanoic acid" [P]. European Patent, EP 3202047 A1, 2017-08-11.
Schröder R, Sørensen M, Nowak P. "A Process for Preparing High-Purity 2-({7-methyl-4-oxo-1h,2h,3h,4h-cyclopenta[c]chromen-9-yl}oxy)propanoic acid" [P]. European Patent, EP 3317919 A1, 2021-10-13.
参考文献 Literature
Yamamoto K, Tanaka H, Suzuki T. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chem., 2014, 2276, (11), 8683-8690.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Environ. Sci. Technol., 2018, 116, (7), 7727-7733.