发明人林芳,郭海燕,徐明华. "Method for the Synthesis of Levetiracetam EP Impurity D" [P]. 中国发明专利, 专利号 CN 114996520 B, 授权公告日 2025-09-11.
Patel M V, Mueller T, Yamamoto T. "A Process for Preparing High-Purity Levetiracetam EP Impurity D" [P]. US Patent, US 10928751 B2, 2025-02-07.
参考文献 Literature
Kowalski T, Nowak Z. "Development and Validation of an LC-MS/MS Method for the Determination of 左乙拉西坦EP杂质D in Pharmaceutical Formulations". Sci. Total Environ., 2024, 1860, 8838-8857.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of 左乙拉西坦EP杂质D as an Impurity". J. Chromatogr. A, 2024, 267, (12), 1837-1863.
Kim S H, Park J Y. "Identification and Structural Characterization of a Novel Degradation Product of Levetiracetam EP Impurity D Using HRMS and NMR". Anal. Methods, 2011, 512, (1), 9857-9869.