Citations for: Gorog SH, B. Analysis of Steroids. 38. The use of high-performance liquid chromatography with diode-array UV detection for estimating impurity profiles of steroid drugs. Journal of Chromatography. 1987; 400:177-86.

Entry Type
Name
Value
Parent Entry
Impurity
8(14)-Dehydrolevonorgestrel
N/A
Impurities Data Field
Source of Impurity
A synthetic side product formed during one of the hydrogenation reactions
8(14)-Dehydrolevonorgestrel (Impurity)
Impurity
9(11)-Dehydroethinyl Estradiol
N/A
Impurity
Norandrostenedione
N/A
Impurities Data Field
Spectra
HPLC, UV
Norandrostenedione (Impurity)
Impurity
17-Epi-Norethisterone
N/A
Impurities Data Field
Source
Byproduct of ethynylation step
17-Epi-Norethisterone (Impurity)
Impurities Data Field
Spectra
HPLC, UV
17-Epi-Norethisterone (Impurity)
Impurity
17α-Ethynyl-17-hydroxy-4-oestrene-3,6-dione
N/A
Impurities Data Field
Spectra
HPLC, UV
17α-Ethynyl-17-hydroxy-4-oestrene-3,6-dione (Impurity)
Impurity
Norethindrone Dimer
N/A
Impurities Data Field
Source
Byproduct of ethynylation step
Norethindrone Dimer (Impurity)
Impurity
Norethindrone
N/A
Impurity
8(14)-Dehydronorgestrel
N/A
Impurities Data Field
Spectra
HPLC, UV
Norethindrone Dimer (Impurity)
Analytical Method
HPLC Settings for Separating Certain Impurities in Norethindrone, Norgestrel, and Ethinyl Estradiol
N/A
Analytical Method
Mass Spectrometry of Certain Impurities of Norethindrone, Norgestrel, and Ethinyl Estradiol
N/A