You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-fluoro-2,10-diazapentacyclo[11.7.1.03,8.09,21.014,19]henicosa-1,3(8),4,6,9,11,13(21),14,16,18-decaene by IUPAC nomenclature, provide its molecular formula.
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C19H11FN2
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