You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named [(1R,2S,9R)-7,11-diazatricyclo[7.3.1.02,7]tridecan-11-yl]-[4-(tetrazol-1-ylmethyl)phenyl]methanone is given. What is its corresponding molecular formula?
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C20H26N6O
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