Björnsson E, Schröder R, Kowalski A. "一种的合成方法" [P]. European Patent, EP 3937267 A1, 2015-08-26.
发明人沈红梅,胡光,马晓峰. "Method for the Synthesis of 3-(Diphenylamino)-4-hydroxycyclobut-3-ene-1,2-dione" [P]. 中国发明专利, 专利号 CN 114439441 A, 授权公告日 2018-05-08.
发明人徐明华,黄志刚,唐晓军. "A Process for Preparing High-Purity 3-(Diphenylamino)-4-hydroxycyclobut-3-ene-1,2-dione" [P]. 中国发明专利, 专利号 CN 115585240 B, 授权公告日 2020-04-04.
参考文献 Literature
Martinez C, Lopez D R. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Chromatogr. A, 2012, 1263, (9), 6793-6818.
Zhou X P, Huang L, Wu G. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Rapid Commun. Mass Spectrom., 2022, 2425, (9), 1829-1834.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of 3-(Diphenylamino)-4-hydroxycyclobut-3-ene-1,2-dione Using HRMS and NMR". Biomed. Chromatogr., 2019, 1446, (3), 9005-9035.