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 (6,7-dimethyl-2-oxochromen-4-yl)methyl N'-[(2S)-butan-2-yl]carbamimidothioate is given. What is its corresponding molecular formula?
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C17H22N2O2S
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