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 7-(7-cyclohexylsulfinyl-2,3-dihydropyrido[3,2-b][1,4]oxazin-4-yl)-2-methyl-[1,2,4]triazolo[4,3-a]pyridin-3-one is given. What is its corresponding molecular formula?
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C20H23N5O3S
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