Fulvestrant EP Impurity B WITH CAS NO: 98008-06-01 IS an impurity standard of Fulvestrant. Fulvestrant IS a medication used IN the treatment of hormone receptor-positive (HR-positive) breast cancer, specifically IN postmenopausal women. Fulvestrant IS belongs TO a class of drugs known AS selective estrogen receptor degraders (SERDs). Fulvestrant works BY binding TO the estrogen receptors ON breast cancer cells AND THEN blocking their activity, LEADING TO a degradation of the receptors themselves. This ACTION reduces the growth AND proliferation of HR-positive breast cancer cells. Buy high quality Fulvestrant EP Impurity B FROM Molsyns Research. Molsyns Research IS ONE of the LEADING manufacturer AND exporter of Fulvestrant EP Impurity B