You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name tert-butyl (8aR)-2-[4-(3-ethoxy-2-methyl-3-oxopropyl)phenyl]-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo[1,5-a]pyrazine-7-carboxylate into its molecular formula.
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C23H33N3O5
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