You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(4-fluorophenyl)-N-[[4-methyl-5-[(4-oxo-3H-quinazolin-2-yl)methylsulfanyl]-1,2,4-triazol-3-yl]methyl]methanesulfonamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H19FN6O3S2
assistant