You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named N-[(2S)-2-(2-chloro-6-fluorophenyl)-2-[(2S)-2-methylmorpholin-4-yl]ethyl]pentanamide is given. What is its corresponding molecular formula?
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C18H26ClFN2O2
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