You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[2-(dimethylamino)-1H-cyclohepta[b][1]benzofuran-9-yl]-1H-1,2,4-triazole-5-carboxamide into molecular formula.
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C18H17N5O2
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