You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-N-[(1,1-dioxothiolan-3-yl)methyl]-2-(methoxymethyl)-6-N-methylpyrimidine-4,6-diamine is the IUPAC name of a molecule. Please give its molecular formula.
user
C12H20N4O3S
assistant