You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[4-[5-(hydroxymethyl)-6-methyl-2,4-dioxo-1H-pyrimidin-3-yl]phenyl]-2-[(2-methylpropan-2-yl)oxycarbonylamino]propanoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H25N3O7
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