You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E)-N-[1-(3-methoxyphenyl)-5-oxopyrrolidin-3-yl]-3-(3,4,5-trimethoxyphenyl)prop-2-enamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H26N2O6
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