You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 3-(5-carbamoylpyridin-2-yl)-N-[(4-chlorophenyl)methyl]-4-oxo-2-sulfanylidene-1H-quinazoline-7-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C22H16ClN5O3S
assistant