Progesterone EP Impurity E

Chemical Name: (R)-1-((8S,9S,10R,13S,14S,17S)-10,13-dimethyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl)ethyl acetate

Synonym: (20R)-3-oxopregn-4-en-20-yl acetate ;