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 N-[3-[(5R)-3-amino-2,5-dimethyl-6H-1,2,4-thiadiazin-5-yl]-2,4,5-trifluorophenyl]-5-methoxypyridine-2-carboxamide is given. What is its corresponding molecular formula?
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C18H18F3N5O2S
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