You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4E)-5-[4-(diethylamino)phenyl]-1-(2,5-difluorophenyl)-4-[(4-ethoxyphenyl)-hydroxymethylidene]pyrrolidine-2,3-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C29H28F2N2O4
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