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 [2-chloro-3-(trifluoromethyl)phenyl]-[5-(6-methylpyridin-2-yl)-10-oxa-3,4,6,12-tetrazatricyclo[6.3.1.02,6]dodeca-2,4-dien-12-yl]methanone is given. What is its corresponding molecular formula?
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C21H17ClF3N5O2
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