You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(8-methyl-4-oxo-3H-quinazolin-2-yl)methyl 4-(1,3-dithiolan-2-yl)benzoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H18N2O3S2
assistant