You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-(6-amino-2,4-dioxo-1-propylpyrimidin-5-yl)-2-oxoethyl] 3-(methoxymethyl)benzoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H21N3O6
assistant