You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1H-benzimidazol-2-yl-[(1S,2R,4R)-2-[[5-(trifluoromethyl)pyrazin-2-yl]amino]-7-azabicyclo[2.2.1]heptan-7-yl]methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H17F3N6O
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