You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[4-(oxolan-2-ylmethylcarbamoyl)phenyl]-2,3-dihydropyrido[2,3-b][1,4]thiazine-1-carboxamide into its molecular formula.
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C20H22N4O3S
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