You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 5-(4-acetylphenyl)-N-[(1R)-1-(1H-benzimidazol-2-yl)-2-phenylethyl]furan-2-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C28H23N3O3
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