Flunisolide Impurity 1

Chemical Name: (2S,6aR,6bS,7S,8aS,8bS,11aR,12aS,12bS)-2-fluoro-7-hydroxy-6a,8a,10,10-tetramethyl-4-oxo-1,2,4,6a,6b,7,8,8a,11a,12,12a,12b-dodecahydro-8bH-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxole-8b-carboxylic acid