fulvestrant and its Impurities
An estrogen receptor antagonist, Fulvestrant is used for the treatment of hormone receptor positive metastatic breast cancer in postmenopausal women. It is administered intramuscularly. Reference standards of Fulvestrant API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.


(7R,8R,9S,13S,14S,17S)-13-Methyl-7-(9-((4,4,5,5,6,6,7,7,7-nonafluoroheptyl)sulfinyl)nonyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
(7R,8R,9S,13S,14S,17S)-13-Methyl-7-(9-((4,4,5,5,6,6,7,7,7-nonafluoroheptyl)sulfinyl)nonyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
Catalogue No.:PA 06 54540
CAS :
NA
Molecular Formula : C34H47F9O3S
Molecular Weight : 706.79


(7R,8R,9S,13S,14S,17S)-13-Methyl-7-(9-((9-((4,4,5,5,5-pentafluoropentyl)sulfinyl)nonyl)sulfinyl)nonyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
(7R,8R,9S,13S,14S,17S)-13-Methyl-7-(9-((9-((4,4,5,5,5-pentafluoropentyl)sulfinyl)nonyl)sulfinyl)nonyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
Catalogue No.:PA 06 54550
CAS :
NA
Molecular Formula : C41H65F5O4S2
Molecular Weight : 781.08


(7R,7'R,8R,8'R,9S,9'S,13S,13'S,14S,14'S,17S,17'S)-7,7'-(Sulfinylbis(nonane-9,1-diyl))bis(13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol)
(7R,7'R,8R,8'R,9S,9'S,13S,13'S,14S,14'S,17S,17'S)-7,7'-(Sulfinylbis(nonane-9,1-diyl))bis(13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol)
Catalogue No.:PA 06 0541001
CAS :
NA
Molecular Formula : C54H82O5S
Molecular Weight : 843.31


(8R,9S,13S,14S,17S)-4-Bromo-13-methyl-7-(9-((4,4,5,5,5-pentafluoropentyl)sulfinyl)nonyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
(8R,9S,13S,14S,17S)-4-Bromo-13-methyl-7-(9-((4,4,5,5,5-pentafluoropentyl)sulfinyl)nonyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
Catalogue No.:PA 06 0541002
CAS :
NA
Molecular Formula : C32H46BrF5O3S
Molecular Weight : 685.67


(7S,8R,9S,13S,14S,17S)-3-Hydroxy-13-methyl-7-(9-((methylsulfonyl)oxy)nonyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
(7S,8R,9S,13S,14S,17S)-3-Hydroxy-13-methyl-7-(9-((methylsulfonyl)oxy)nonyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
Catalogue No.:PA 06 0541013
CAS :
1621885-80-0
Molecular Formula : C30H46O6S
Molecular Weight : 534.75


(7S,8R,9S,13S,14S,17S)-3-Hydroxy-13-methyl-7-(9-((methylsulfonyl)oxy)nonyl)-6-oxo-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
(7S,8R,9S,13S,14S,17S)-3-Hydroxy-13-methyl-7-(9-((methylsulfonyl)oxy)nonyl)-6-oxo-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
Catalogue No.:PA 06 0541014
CAS :
1621885-81-1
Molecular Formula : C30H44O7S
Molecular Weight : 548.74


(8R,9S,13S,14S,17S)-3-Hydroxy-13-methyl-7-(9-((methylsulfonyl)oxy)nonyl)-8,9,12,13,14,15,16,17-octahydro-11H-cyclopenta[a]phenanthren-17-yl acetate
(8R,9S,13S,14S,17S)-3-Hydroxy-13-methyl-7-(9-((methylsulfonyl)oxy)nonyl)-8,9,12,13,14,15,16,17-octahydro-11H-cyclopenta[a]phenanthren-17-yl acetate
Catalogue No.:PA 06 0541015
CAS :
1621885-82-2
Molecular Formula : C30H44O6S
Molecular Weight : 532.74


(7R,8R,9S,13S,14S,17S)-7-(9-Chlorononyl)-3-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
(7R,8R,9S,13S,14S,17S)-7-(9-Chlorononyl)-3-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
Catalogue No.:PA 06 0541016
CAS :
2490287-82-4
Molecular Formula : C29H43ClO3
Molecular Weight : 475.11


(7S,8R,9S,13S,14S,17S)-7-(9-Bromononyl)-3-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
(7S,8R,9S,13S,14S,17S)-7-(9-Bromononyl)-3-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
Catalogue No.:PA 06 0541018
CAS :
2490287-87-9
Molecular Formula : C29H43BrO3
Molecular Weight : 519.56


Sodium (7R,8R,9S,13S,14S,17S)-13-methyl-7-(9-((4,4,5,5,5-pentafluoropentyl)sulfinyl)nonyl)-3-(sulfooxy)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-olate
Sodium (7R,8R,9S,13S,14S,17S)-13-methyl-7-(9-((4,4,5,5,5-pentafluoropentyl)sulfinyl)nonyl)-3-(sulfooxy)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-olate
Catalogue No.:PA 06 0541019
CAS :
403656-83-7
Molecular Formula : C32H46F5NaO6S2
Molecular Weight : 708.82


(7R,8R,9S,10R,13S,14S,17S)-7-(9-Bromononyl)-13-methyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl acetate
(7R,8R,9S,10R,13S,14S,17S)-7-(9-Bromononyl)-13-methyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl acetate
Catalogue No.:PA 06 0541023
CAS :
875573-63-0
Molecular Formula : C29H45BrO3
Molecular Weight : 521.58


(7S,8R,9S,13S,14S,17S)-13-Methyl-7-(9-((4,4,5,5,5-pentafluoropentyl)thio)nonyl)-3,17-bis((tetrahydro-2H-pyran-2-yl)oxy)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-6-ol
(7S,8R,9S,13S,14S,17S)-13-Methyl-7-(9-((4,4,5,5,5-pentafluoropentyl)thio)nonyl)-3,17-bis((tetrahydro-2H-pyran-2-yl)oxy)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-6-ol
Catalogue No.:PA 06 0541025
CAS :
2170233-15-3
Molecular Formula : C42H63F5O5S
Molecular Weight : 775.01


(7S,8S,9R,13R,14R,17R)-13-Methyl-7-(9-((4,4,5,5,5-pentafluoropentyl)sulfinyl)nonyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
(7S,8S,9R,13R,14R,17R)-13-Methyl-7-(9-((4,4,5,5,5-pentafluoropentyl)sulfinyl)nonyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
Catalogue No.:PA 06 0541030
CAS :
NA
Molecular Formula : C32H47F5O3S
Molecular Weight : 606.78


(7R,8R,9S,13S,14S,17R)-7-(9-Bromononyl)-3-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
(7R,8R,9S,13S,14S,17R)-7-(9-Bromononyl)-3-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
Catalogue No.:PA 06 0541032
CAS :
NA
Molecular Formula : C29H43BrO3
Molecular Weight : 519.56


(7S)-3-((9-((7R)-17-Acetoxy-3-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-7-yl)nonyl)oxy)-7-(9-bromononyl)-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
(7S)-3-((9-((7R)-17-Acetoxy-3-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-7-yl)nonyl)oxy)-7-(9-bromononyl)-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
Catalogue No.:PA 06 0541033
CAS :
NA
Molecular Formula : C58H85BrO6
Molecular Weight : 958.22


(7R,8R,9S,13S,14S,17S)-4-Bromo-7-(9-bromononyl)-3-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
(7R,8R,9S,13S,14S,17S)-4-Bromo-7-(9-bromononyl)-3-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
Catalogue No.:PA 06 0541034
CAS :
NA
Molecular Formula : C29H42Br2O3
Molecular Weight : 598.46


(7R,8R,9S,13S,14S,17S)-4-Bromo-13-methyl-7-(9-((4,4,5,5,5-pentafluoropentyl)sulfinyl)nonyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
(7R,8R,9S,13S,14S,17S)-4-Bromo-13-methyl-7-(9-((4,4,5,5,5-pentafluoropentyl)sulfinyl)nonyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
Catalogue No.:PA 06 0541035
CAS :
NA
Molecular Formula : C32H46BrF5O3S
Molecular Weight : 685.67


(7α,17β)-3,17-Dihydroxy-7-[9-[(4,4,5,5,5-pentafluoropentyl)sulfinyl]nonyl]estra-1,3,5(10)-trien-6-one
(7α,17β)-3,17-Dihydroxy-7-[9-[(4,4,5,5,5-pentafluoropentyl)sulfinyl]nonyl]estra-1,3,5(10)-trien-6-one
Catalogue No.:PA 06 0541036
CAS :
2858589-78-1
Molecular Formula : C32H45F5O4S
Molecular Weight : 620.76