You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (4S)-1-(3,5-dimethylphenyl)-4-[1-[(2,5-dimethylphenyl)methyl]benzimidazol-2-yl]pyrrolidin-2-one into its molecular formula.
user
C28H29N3O
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