You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by N-[(2S)-4,4-difluoro-1-(hydroxyamino)-3-methyl-3-(methylcarbamoylamino)-1-oxobutan-2-yl]-4-[2-(4-fluorophenyl)ethynyl]benzamide ?
user
C22H21F3N4O4
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