发明人孙丽萍,钱学锋,杨光. "一种吉非替尼杂质20的合成方法" [P]. 中国发明专利, 专利号 CN 117395843 A, 授权公告日 2018-10-02.
发明人何建平,王建平,罗永刚. "Method for the Synthesis of Gefitinib Impurity 20" [P]. 中国发明专利, 专利号 CN 113255164 A, 授权公告日 2015-12-07.
发明人孙丽萍,冯建国,周伟. "A Process for Preparing High-Purity Gefitinib Impurity 20" [P]. 中国发明专利, 专利号 CN 112131307 A, 授权公告日 2017-02-16.
参考文献 Literature
Zhou X P, Huang L, Wu G. "Development and Validation of an LC-MS/MS Method for the Determination of 吉非替尼杂质20 in Pharmaceutical Formulations". J. Nat. Prod., 2010, 2386, 3836-3842.
Brown R C, Davis S M. "A Stability-Indicating HPLC Method for the Separation and Quantification of 吉非替尼杂质20 as an Impurity". J. Chromatogr. A, 2012, 230, 3556-3571.
Wang L, Li J, Zhang H. "Identification and Structural Characterization of a Novel Degradation Product of Gefitinib Impurity 20 Using HRMS and NMR". Food Chem., 2011, 1924, 7419-7422.