Cabozantinib 3-Fluoro Impurity는 cabozantinib의 정의된 할로겐화 공정 관련 유사체로, 플루오르화 중간체의 도입 또는 의약 합성 중 위치선택적 치환에 의해 생성될 수 있다. 분자식 C28H24FN3O5, 분자량 501.51 g/mol이며, 퀴놀린, 에터, 아마이드가 풍부한 골격을 유지하면서 3-플루오로 방향족 치환을 도입하여 극성, 이온화 거동, 크로마토그래피 보유 특성에 영향을 줄 수 있다. 모체 성분과의 높은 구조적 유사성 때문에 LC-MS/MS, 고해상도 질량분석, NMR이 요구되며, 불순물 규명은 일반적으로 LC-UV와 탠덤 MS 단편화 분석으로 보강된다.
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