You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-[2-[(4-ethoxy-3-methoxyphenyl)methylidene]hydrazinyl]-2-oxoethyl]-1,3-benzodioxole-5-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H21N3O6
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