You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-(1,1-dioxo-1,4-thiazinan-4-yl)propyl]-2-thiophen-3-ylquinazolin-4-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H22N4O2S2
assistant