You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
dimethyl 2-[(2R,3R)-4-amino-3-[(2-methoxyacetyl)amino]-4-oxobutan-2-yl]propanedioate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C12H20N2O7
assistant