You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule (2S)-2-methyl-9-oxo-N-[(2R)-pentan-2-yl]-1-azatricyclo[6.3.1.04,12]dodeca-4(12),5,7,10-tetraene-10-carboxamide into molecular formula.
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C18H22N2O2
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