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 3-chloro-N-[4-([1,2,4]triazolo[4,3-a]pyridin-3-ylmethyl)phenyl]benzamide is given. What is its corresponding molecular formula?
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C20H15ClN4O
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