You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [2-(4-bromo-2-fluoroanilino)-2-oxoethyl]-[2-[(4-chlorophenyl)methylamino]-2-oxoethyl]-ethylazanium into molecular formula.
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C19H21BrClFN3O2+
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