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)-N-[(4-methoxy-3,5-dimethylphenyl)methyl]-1-([1,2,4]triazolo[4,3-a]pyridin-3-yl)ethanamine is given. What is its corresponding molecular formula?
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C18H22N4O
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