You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (E)-3-(6-ethoxy-7-methyl-3-phenyl-1-benzofuran-5-yl)-N-[(4-methylphenyl)methyl]but-2-enamide by IUPAC nomenclature, provide its molecular formula.
user
C29H29NO3
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