You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-[[(3S)-1,1-dioxothiolan-3-yl]-methylamino]-2-oxoethyl] 2-[methyl(pyrimidin-2-yl)amino]acetate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C14H20N4O5S
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