Dapagliflozin keto impurity

Chemical Name: (2-Chloro-5-((2S,3R,4R,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)phenyl)(4-ethoxyphenyl)methanone ; (1S)-1,5-Anhydro-1-[4-chloro-3-(4-ethoxybenzoyl)phenyl]-D-glucitol