You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(1,1-dioxothiolan-3-yl)-N-ethyl-2,2-dimethyl-N'-[(4-methylphenyl)methyl]propanediamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H28N2O4S
assistant