Dinoprostone EP Impurity C

Chemical Name: (E)-7-[(1R,2R,3R)-3-hydroxy-2-[(E)-(3S)-3-hydroxyoct-1-enyl]-5-oxocyclopentyl]hept-5-enoic acid  (as per EP) ; (E)-7-{(1R,2R,3R)-3-Hydroxy-2-[(S,E)-3-hydroxyoct-1-en-1-yl]-5-oxocyclopentyl}hept-5-enoic acid (as per USP)