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Mometasone Impurity A Mometasone EP Impurity A MoMetasone Furoate IMpurity A Mometasone Furoate EP Impurity A 21-CHLORO-9,11-EPOXY-17-HYDROXY-16-METHYL-1,4- Mometasone Furoate Impurity 9(Mometasone Furoate EP Impurity A) 21-Chloro-16α-methyl-3,20-dioxopregna-1,4,9(11)-trien-17-yl furan-2-carboxylate 21-chloro-16α-methyl-17α-hydroxy-1,4,9(11)-pregnatriene-3,20-dione 17-(2'-furoate) Pregna-1,4,9(11)-triene-3,20-dione, 21-chloro-17-[(2-furanylcarbonyl)oxy]-16-methyl-, (16α)- Mometasone Furoate EP Impurity A/(16α)-21-Chloro-17-[(2-furanylcarbonyl)oxy]-16-methylpregna-1,4,9(11)-triene-3,20-dione (8S,10S,13S,14S,16R,17R)-17-(2-chloroacetyl)-10,13,16-trimethyl-3-oxo-6,7,8,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-17-yl furan-2-carboxylate