You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2R)-N-[2-(3-methoxyphenyl)ethyl]-4-methyl-2-[2-oxo-2-[1-pentan-3-yl-2-(thiophen-2-ylmethyl)benzimidazol-5-yl]ethyl]pentanamide into molecular formula.
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C34H43N3O3S
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