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 (2R)-2-[4-(1H-imidazol-2-yl)piperazin-1-yl]-N-(2-propan-2-ylphenyl)propanamide is given. What is its corresponding molecular formula?
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C19H27N5O
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