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 1-(3-chlorophenyl)-N-[(5-propan-2-yl-1,2,4-oxadiazol-3-yl)methyl]-1-pyridin-2-ylmethanamine is given. What is its corresponding molecular formula?
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C18H19ClN4O
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