You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[2-[[3-(1,3-benzoxazol-2-yl)-3-azabicyclo[3.1.0]hexan-6-yl]amino]acetyl]-4-fluoropyrrolidine-2-carbonitrile by IUPAC nomenclature, provide its molecular formula.
user
C19H20FN5O2
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