Lefèvre J P, Nowak P, Nielsen H. "Method for the Synthesis of 5-(4-Ethoxyphenyl)-5-(ethyl-d5)barbituric Acid (1.0mg/ml in Acetonitrile)" [P]. European Patent, EP 3246424 A1, 2020-09-05.
Rossi M, Björnsson E, Nowak P. "A Process for Preparing High-Purity 5-(4-Ethoxyphenyl)-5-(ethyl-d5)barbituric Acid (1.0mg/ml in Acetonitrile)" [P]. European Patent, EP 3569579 A1, 2018-08-20.
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". Molecules, 2012, 1610, (9), 9004-9009.
Kim S H, Park J Y. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2019, 1172, (4), 8162-8192.
Brown R C, Davis S M. "Identification and Structural Characterization of a Novel Degradation Product of 5-(4-Ethoxyphenyl)-5-(ethyl-d5)barbituric Acid (1.0mg/ml in Acetonitrile) Using HRMS and NMR". J. Sep. Sci., 2010, 2454, (2), 1394-1399.