Estetrol Impurity 1

Chemical Name: (8R,9S,13S,14S,15R,16R,17R)-2,4-dibromo-3,15,16-trihydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate

Smile: OC1=C(Br)C=C2[C@@]3([H])CC[C@]4(C)[C@@H](OC(C)=O)[C@H](O)[C@H](O)[C@@]4([H])[C@]3([H])CCC2=C1Br