You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
propan-2-yl 3-[(4E)-4-[(3,5-dichloro-2,4-dimethoxyphenyl)-hydroxymethylidene]-2,3-dioxo-5-pyridin-3-ylpyrrolidin-1-yl]benzoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C28H24Cl2N2O7
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