Norelgestromin
C21H29NO2
327.46
18,19-Dinorpregn-4-en-20-yn-3-one, 13-ethyl-17-hydroxy-, oxime, (17α)-;
13-Ethyl-17-hydroxy-18,19-dinor-17α-pregn-4-en-20-yn-3-one oxime [53016-31-2]
18,19-Dinorpregn-4-en-20-yn-3-one, 13-ethyl-17-hydroxy-, oxime, (17α)-;
13-Ethyl-17-hydroxy-18,19-dinor-17α-pregn-4-en-20-yn-3-one oxime [53016-31-2]
DEFINITION
Norelgestromin is a mixture of (E)- and (Z)-isomers having a ratio of (E)- to (Z)-isomer between 1.3 and 1.6, and the sum of both isomers is NLT 98.0% and NMT 102.0% of norelgestromin (C21H29NO2), calculated on the anhydrous basis.