发明人冯建国,郑宇鹏,马晓峰. "一种维生素K1杂质21的合成方法" [P]. 中国发明专利, 专利号 CN 117555293 A, 授权公告日 2023-03-02.
Fischer A B, Roberts E F, Anderson J P. "Method for the Synthesis of Vitamin K1 Impurity 21" [P]. US Patent, US 9352882 B2, 2021-11-19.
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 维生素K1杂质21 in Pharmaceutical Formulations". Chromatographia, 2020, 1779, 6170-6200.
Yang F, Sun W, Liu J. "A Stability-Indicating HPLC Method for the Separation and Quantification of 维生素K1杂质21 as an Impurity". Anal. Methods, 2025, 1725, (5), 477-503.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of Vitamin K1 Impurity 21 Using HRMS and NMR". Biomed. Chromatogr., 2015, 1776, (12), 9174-9182.