Fulvestrant Impurity 1

Chemical Name: (8R,8'R,9S,9'S,13S,13'S,14S,14'S,17S,17'S)-nonane-1,9-diylbis(3-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-7,17-diyl) diacetate

Synonym: N-Desmethyl Impurity 2 ; N-(4-methoxy-2-(methyl(2-(methylamino)ethyl)amino)-5-((4-(1-methyl-1H-indol-3-yl)pyrimidin-2-yl)amino)phenyl)acrylamide