You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule methyl (6S)-6-(cycloheptylcarbamoyl)-6-methyl-7-[(2-methylphenyl)methyl]-8-oxo-5H-imidazo[1,5-a]pyrazine-1-carboxylate into molecular formula.
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C25H32N4O4
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