Fluticasone Furoate EP Impurity A

: Fluticasone Furoate BP Impurity A; (6α,11β,16α,17α)-6,9-Difluoro-17-[(2-furanylcarbonyl)oxy]-11-hydroxy-16-methyl-3-oxoandrosta-1,4-diene-17-carboxylic Acid; (6S,8S,9R,10S,11S,13S,14S,16R,17R)-6,9-Difluoro-17-(furan-2-carbonyloxy)-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthrene-17-carboxylic acid;