You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule ethyl 2,4-dimethyl-5-[2-[(Z)-(3,4,5-trimethoxyphenyl)methylideneamino]oxyacetyl]-1H-pyrrole-3-carboxylate .
user
C21H26N2O7
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