You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-methyl-4-oxo-3-prop-2-enyl-2-sulfanylidene-N-[[4-(trifluoromethyl)phenyl]methyl]-1H-quinazoline-7-carboxamide into its molecular formula.
user
C21H18F3N3O2S
assistant