You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[1-benzyl-2-[2-(3,3-dimethylbutanoylamino)-2-pyridin-3-ylethyl]benzimidazole-5-carbonyl]amino]propanoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C31H35N5O4
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