You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (4E)-5-(2,3-dimethoxyphenyl)-1-(furan-2-ylmethyl)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]pyrrolidine-2,3-dione by IUPAC nomenclature, provide its molecular formula.
user
C27H25NO7
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