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 methyl (2R,3R,8S,9R,12S,13R,14S)-14-cyano-3-formyl-1-azatetracyclo[6.6.1.02,12.03,9]pentadec-5-ene-13-carboxylate is given. What is its corresponding molecular formula?
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C18H22N2O3
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