You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1,3-bis(1-methoxyethyl)-5-nitro-6-[(E)-2-(1-phenylpyrazol-4-yl)ethenyl]pyrimidine-2,4-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H23N5O6
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