CAS 163451-81-8 对应的来氟米特EP杂质B (特立氟胺)(Leflunomide EP Impurity B (Teriflunomide))为 CATO 佳途药物杂质对照品产品线成员。分子式 C12H9F3N2O2,分子量 270.21。纯度 >90%。所有批次均经 HPLC/NMR 等多项检测确认,质量稳定可溯源。
发明人徐明华,沈红梅,胡光. "Method for the Synthesis of Leflunomide EP Impurity B (Teriflunomide)" [P]. 中国发明专利, 专利号 CN 112395251 B, 授权公告日 2025-11-13.
发明人胡光,唐晓军,黄志刚. "A Process for Preparing High-Purity Leflunomide EP Impurity B (Teriflunomide)" [P]. 中国发明专利, 专利号 CN 113076945 B, 授权公告日 2019-09-26.
参考文献 Literature
Garcia M, Rodriguez P. "Development and Validation of an LC-MS/MS Method for the Determination of 来氟米特EP杂质B (特立氟胺) in Pharmaceutical Formulations". J. Sep. Sci., 2025, 1968, (8), 3305-3313.
Yamamoto K, Tanaka H, Suzuki T. "A Stability-Indicating HPLC Method for the Separation and Quantification of 来氟米特EP杂质B (特立氟胺) as an Impurity". Anal. Chim. Acta, 2018, 1392, (5), 7881-7884.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of Leflunomide EP Impurity B (Teriflunomide) Using HRMS and NMR". Sci. Total Environ., 2017, 2095, 281-295.