You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(cyclohexa-2,4-dien-1-ylmethyl)-3-(2H-tetrazol-5-yl)cyclohepta[b]pyrrol-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H15N5O
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