You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[2-(difluoromethoxy)phenyl]-4-(2-methylpropanoyl)-1-[4-(5-methylthiophen-2-yl)phenyl]pyrrolidine-2,3-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H23F2NO4S
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