You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4E,5R)-4-[(4-butoxy-3-methylphenyl)-hydroxymethylidene]-1-(3-methoxypropyl)-5-phenylpyrrolidine-2,3-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H31NO5
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