You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 4-N-(5-bromo-4-methylpyrimidin-2-yl)-1-N-(1-ethylpyrrolidin-3-yl)-2-fluorobenzene-1,4-diamine into molecular formula.
user
C17H21BrFN5
assistant