You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(4-methoxyphenyl)methyl]-3-(2-oxo-5-sulfanylidene-1,3-dihydroimidazo[1,2-c]quinazolin-3-yl)propanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H20N4O3S
assistant