Estriol Related Compound A; 9, 11-didehydroestriol; (8S,13S,14S,16R,17R)-13-methyl-7,8,12,13,14,15,16,17-octahydro-6H-cyclopenta[a]phenanthrene-3,16,17-triol
설명
Estriol EP Impurity A는 Estriol Related Compound A 및 9,11-didehydroestriol로도 지칭되는, estriol에서 유래한 산화 및 탈수성 스트레스 관련 스테로이드 분해산물이다. CAS 246021-20-5, 분자식 C18H22O3, 분자량 286.37 g/mol의 이 불포화 에스트로겐성 불순물은 C9-C11 부위의 포화도 감소로 공액 스테로이드 골격이 변형되며, 크로마토그래피 극성과 UV 반응에 영향을 줄 수 있다. 미량 정량에는 일반적으로 HPLC 또는 UHPLC와 LC-MS/MS의 결합 분리가 요구되며, 필요 시 고분해능 MS로 확증한다. estriol 함유 물질의 불순물 프로파일링 및 안정성 평가에 중요하다.
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