Desogestrel EP Impurity E

Chemical Name: 13-ethyl-11-methylidene-18,19-dinor-17α-pregn-4-en-20-yne-3β,17-diol (as per EP); 13-Ethyl-3-hydroxy-11-methylene-18,19-dinor-17α-pregn-4-en-20-yn-17-ol (as per USP)

Synonym: 4-(((4-(2-hydroxyethyl)-1H-pyrrole-3-carbonyl)oxy)methyl)-1H-pyrrole-3-carboxylic acid