You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-oxo-2-(5-phenyl-3,4-dihydropyrazol-2-yl)ethyl] 2-benzo[e][1]benzofuran-1-ylacetate is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H20N2O4
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