You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (1R,9R,10R)-3,5-dibromo-17-azatetracyclo[7.5.3.01,10.02,7]heptadeca-2,4,6-trien-4-ol;2,2,2-trifluoroacetic acid into molecular formula.
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C18H20Br2F3NO3
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